Merge pull request #87 from python-discord/feat/deps/site-isolation

11 files changed, 149 insertions, 446 deletions

diff --git a/.flake8 b/.flake8
index 9d391f9..7ebe432 100644
--- a/.flake8
+++ b/.flake8
@@ -16,7 +16,7 @@ ignore=
     ANN002,ANN003,ANN101,ANN102,ANN204,ANN206
 exclude=
     __pycache__,.cache,
-    venv,.venv
+    venv,.venv,user_base
 per-file-ignores=tests/*:D1,ANN
 import-order-style=pycharm
 inline-quotes="
diff --git a/.github/workflows/lint-test-build-push.yaml b/.github/workflows/lint-test-build-push.yaml
index 4b957f1..ef8a912 100644
--- a/.github/workflows/lint-test-build-push.yaml
+++ b/.github/workflows/lint-test-build-push.yaml
@@ -96,9 +96,10 @@ jobs:
           --entrypoint /bin/bash
           ghcr.io/python-discord/snekbox-venv:${{ steps.sha_tag.outputs.tag }}
 
+      # One of the unit tests needs to import numpy.
       - name: Install dependencies
         run: "docker exec snekbox_test /bin/bash -c \
-          'pipenv install --system --deploy --dev'"
+          'pipenv install --system --deploy --dev && pip install numpy'"
 
       # This runs `flake8` in the container and asks `flake8` to output
       # linting errors in the format of the command for registering workflow
diff --git a/Dockerfile b/Dockerfile
index a358635..eefb795 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -35,13 +35,12 @@ RUN chmod +x /usr/sbin/nsjail
 
 FROM base as venv
 ARG DEV
-ARG git_sha="development"
 
 ENV PIP_NO_CACHE_DIR=false \
     PIPENV_DONT_USE_PYENV=1 \
     PIPENV_HIDE_EMOJIS=1 \
     PIPENV_NOSPIN=1 \
-    GIT_SHA=$git_sha
+    PYTHONUSERBASE=/snekbox/user_base
 
 COPY Pipfile Pipfile.lock /snekbox/
 WORKDIR /snekbox
@@ -54,6 +53,7 @@ RUN if [ -n "${DEV}" ]; \
     fi
 
 # At the end to avoid re-installing dependencies when only a config changes.
+# It's in the venv image because the final image is not used during development.
 COPY config/ /snekbox/config
 
 FROM venv
@@ -63,3 +63,7 @@ CMD ["-c", "config/gunicorn.conf.py", "snekbox.api.app"]
 
 COPY . /snekbox
 WORKDIR /snekbox
+
+# At the end to prevent it from invalidating the layer cache.
+ARG git_sha="development"
+ENV GIT_SHA=$git_sha
diff --git a/Pipfile b/Pipfile
index 237c1fa..eaac4cc 100644
--- a/Pipfile
+++ b/Pipfile
@@ -4,28 +4,10 @@ verify_ssl = true
 name = "pypi"
 
 [packages]
-arrow = "~= 0.17"
-attrs = "~= 20.3"
-beautifulsoup4 = "~= 4.9"
 falcon = "~= 2.0.0"
-forbiddenfruit = "~= 0.1"
-fuzzywuzzy = "~= 0.18"
 gunicorn = "~= 20.0"
 jsonschema = "~= 3.2"
-lark = "~= 0.10"
-more-itertools = "~= 8.6"
-networkx = "~= 2.5"
-numpy = "~= 1.19"
-pandas = "~= 1.1"
-pendulum = "~= 2.1"
-python-dateutil = "~= 2.8"
-python-levenshtein = "~=0.12.0"
-pyyaml = "~= 5.3"
-scipy = "~= 1.5"
 sentry-sdk = {extras = ["falcon"], version = "~= 0.19.3"}
-sympy = "~= 1.6"
-toml = "~= 0.10"
-yarl = "~= 1.6"
 
 [dev-packages]
 coverage = "~= 5.3"
diff --git a/Pipfile.lock b/Pipfile.lock
index 7c49075..71280ec 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "55406a3c3f1c64403f7f1efdc2cc215056c914a10c7da823e11ef707b53d3fff"
+            "sha256": "c227f05edf75934ae0c592f2b15186e589905c3439a339eacb2df4ffe4c8b466"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -16,44 +16,20 @@
         ]
     },
     "default": {
-        "arrow": {
-            "hashes": [
-                "sha256:e098abbd9af3665aea81bdd6c869e93af4feb078e98468dd351c383af187aac5",
-                "sha256:ff08d10cda1d36c68657d6ad20d74fbea493d980f8b2d45344e00d6ed2bf6ed4"
-            ],
-            "index": "pypi",
-            "version": "==0.17.0"
-        },
         "attrs": {
             "hashes": [
                 "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6",
                 "sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700"
             ],
-            "index": "pypi",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==20.3.0"
         },
-        "beautifulsoup4": {
-            "hashes": [
-                "sha256:4c98143716ef1cb40bf7f39a8e3eec8f8b009509e74904ba3a7b315431577e35",
-                "sha256:84729e322ad1d5b4d25f805bfa05b902dd96450f43842c4e99067d5e1369eb25",
-                "sha256:fff47e031e34ec82bf17e00da8f592fe7de69aeea38be00523c04623c04fb666"
-            ],
-            "index": "pypi",
-            "version": "==4.9.3"
-        },
         "certifi": {
             "hashes": [
-                "sha256:1f422849db327d534e3d0c5f02a263458c3955ec0aae4ff09b95f195c59f4edd",
-                "sha256:f05def092c44fbf25834a51509ef6e631dc19765ab8a57b4e7ab85531f0a9cf4"
-            ],
-            "version": "==2020.11.8"
-        },
-        "decorator": {
-            "hashes": [
-                "sha256:41fa54c2a0cc4ba648be4fd43cff00aedf5b9465c9bf18d64325bc225f08f760",
-                "sha256:e3a62f0520172440ca0dcc823749319382e377f37f140a0b99ef45fecb84bfe7"
+                "sha256:1a4995114262bffbc2413b159f2a1a480c969de6e6eb13ee966d470af86af59c",
+                "sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830"
             ],
-            "version": "==4.4.2"
+            "version": "==2020.12.5"
         },
         "falcon": {
             "hashes": [
@@ -75,21 +51,6 @@
             "index": "pypi",
             "version": "==2.0.0"
         },
-        "forbiddenfruit": {
-            "hashes": [
-                "sha256:1188a07cc24a9bd2c529dad06490b80a6fc88cde968af4d7861da81686b2cc8c"
-            ],
-            "index": "pypi",
-            "version": "==0.1.3"
-        },
-        "fuzzywuzzy": {
-            "hashes": [
-                "sha256:45016e92264780e58972dca1b3d939ac864b78437422beecebb3095f8efd00e8",
-                "sha256:928244b28db720d1e0ee7587acf660ea49d7e4c632569cad4f1cd7e68a5f0993"
-            ],
-            "index": "pypi",
-            "version": "==0.18.0"
-        },
         "gunicorn": {
             "hashes": [
                 "sha256:1904bb2b8a43658807108d59c3f3d56c2b6121a701161de0ddf9ad140073c626",
@@ -98,14 +59,6 @@
             "index": "pypi",
             "version": "==20.0.4"
         },
-        "idna": {
-            "hashes": [
-                "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6",
-                "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"
-            ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.10"
-        },
         "jsonschema": {
             "hashes": [
                 "sha256:4e5b3cf8216f577bee9ce139cbe72eca3ea4f292ec60928ff24758ce626cd163",
@@ -114,176 +67,6 @@
             "index": "pypi",
             "version": "==3.2.0"
         },
-        "lark": {
-            "hashes": [
-                "sha256:d755f63b8d361110dce780ca6806833b14ddb0b831f3dbcce2ddec187374ff37",
-                "sha256:f2c6ed79ae128a89714bbaa4a6ecb61b6eec84d1b5d63b9195ad461762f96298"
-            ],
-            "index": "pypi",
-            "version": "==0.11.1"
-        },
-        "more-itertools": {
-            "hashes": [
-                "sha256:8e1a2a43b2f2727425f2b5839587ae37093f19153dc26c0927d1048ff6557330",
-                "sha256:b3a9005928e5bed54076e6e549c792b306fddfe72b2d1d22dd63d42d5d3899cf"
-            ],
-            "index": "pypi",
-            "version": "==8.6.0"
-        },
-        "mpmath": {
-            "hashes": [
-                "sha256:fc17abe05fbab3382b61a123c398508183406fa132e0223874578e20946499f6"
-            ],
-            "version": "==1.1.0"
-        },
-        "multidict": {
-            "hashes": [
-                "sha256:060d68ae3e674c913ec41a464916f12c4d7ff17a3a9ebbf37ba7f2c681c2b33e",
-                "sha256:06f39f0ddc308dab4e5fa282d145f90cd38d7ed75390fc83335636909a9ec191",
-                "sha256:17847fede1aafdb7e74e01bb34ab47a1a1ea726e8184c623c45d7e428d2d5d34",
-                "sha256:1cd102057b09223b919f9447c669cf2efabeefb42a42ae6233f25ffd7ee31a79",
-                "sha256:20cc9b2dd31761990abff7d0e63cd14dbfca4ebb52a77afc917b603473951a38",
-                "sha256:2576e30bbec004e863d87216bc34abe24962cc2e964613241a1c01c7681092ab",
-                "sha256:2ab9cad4c5ef5c41e1123ed1f89f555aabefb9391d4e01fd6182de970b7267ed",
-                "sha256:359ea00e1b53ceef282232308da9d9a3f60d645868a97f64df19485c7f9ef628",
-                "sha256:3e61cc244fd30bd9fdfae13bdd0c5ec65da51a86575ff1191255cae677045ffe",
-                "sha256:43c7a87d8c31913311a1ab24b138254a0ee89142983b327a2c2eab7a7d10fea9",
-                "sha256:4a3f19da871befa53b48dd81ee48542f519beffa13090dc135fffc18d8fe36db",
-                "sha256:4df708ef412fd9b59b7e6c77857e64c1f6b4c0116b751cb399384ec9a28baa66",
-                "sha256:59182e975b8c197d0146a003d0f0d5dc5487ce4899502061d8df585b0f51fba2",
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-                "sha256:9380b3f2b00b23a4106ba9dd022df3e6e2e84e1788acdbdd27603b621b3288df",
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-                "sha256:a7b8b5bd16376c8ac2977748bd978a200326af5145d8d0e7f799e2b355d425b6",
-                "sha256:af271c2540d1cd2a137bef8d95a8052230aa1cda26dd3b2c73d858d89993d518",
-                "sha256:b561e76c9e21402d9a446cdae13398f9942388b9bff529f32dfa46220af54d00",
-                "sha256:b82400ef848bbac6b9035a105ac6acaa1fb3eea0d164e35bbb21619b88e49fed",
-                "sha256:b98af08d7bb37d3456a22f689819ea793e8d6961b9629322d7728c4039071641",
-                "sha256:c58e53e1c73109fdf4b759db9f2939325f510a8a5215135330fe6755921e4886",
-                "sha256:cbabfc12b401d074298bfda099c58dfa5348415ae2e4ec841290627cb7cb6b2e",
-                "sha256:d4a6fb98e9e9be3f7d70fd3e852369c00a027bd5ed0f3e8ade3821bcad257408",
-                "sha256:d99da85d6890267292065e654a329e1d2f483a5d2485e347383800e616a8c0b1",
-                "sha256:e58db0e0d60029915f7fc95a8683fa815e204f2e1990f1fb46a7778d57ca8c35",
-                "sha256:e5bf89fe57f702a046c7ec718fe330ed50efd4bcf74722940db2eb0919cddb1c",
-                "sha256:f612e8ef8408391a4a3366e3508bab8ef97b063b4918a317cb6e6de4415f01af",
-                "sha256:f65a2442c113afde52fb09f9a6276bbc31da71add99dc76c3adf6083234e07c6",
-                "sha256:fa0503947a99a1be94f799fac89d67a5e20c333e78ddae16e8534b151cdc588a"
-            ],
-            "markers": "python_version >= '3.5'",
-            "version": "==5.0.2"
-        },
-        "networkx": {
-            "hashes": [
-                "sha256:7978955423fbc9639c10498878be59caf99b44dc304c2286162fd24b458c1602",
-                "sha256:8c5812e9f798d37c50570d15c4a69d5710a18d77bafc903ee9c5fba7454c616c"
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-            "index": "pypi",
-            "version": "==2.5"
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-        "numpy": {
-            "hashes": [
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-            "version": "==1.19.4"
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                 "sha256:2e636185d9eb976a18a8a8e96efce62f2905fea90041958d8cc2a189756ebf3e"
@@ -291,94 +74,16 @@
             "markers": "python_version >= '3.5'",
             "version": "==0.17.3"
         },
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-            "version": "==2020.1"
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-            "version": "==1.5.4"
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             "extras": [
                 "falcon"
             ],
             "hashes": [
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-                "sha256:fd48f627945511c140546939b4d73815be4860cd1d2b9149577d7f6563e7bd60"
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-            "version": "==0.19.3"
+            "version": "==0.19.5"
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         "six": {
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@@ -388,30 +93,6 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==1.15.0"
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         "urllib3": {
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                 "sha256:19188f96923873c92ccb987120ec4acaa12f0461fa9ce5d3d0772bc965a39e08",
@@ -419,49 +100,6 @@
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
             "version": "==1.26.2"
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@@ -477,7 +115,7 @@
                 "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6",
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-            "index": "pypi",
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             "version": "==20.3.0"
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@@ -490,43 +128,58 @@
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-                "sha256:c5f17ad25d2c1286436761b462e22b5020d83316f8e8fcb5deb2b3151f8f1d3a",
-                "sha256:c851b35fc078389bc16b915a0a7c1d5923e12e2c5aeec58c52f4aa8085ac8237",
-                "sha256:cb7df71de0af56000115eafd000b867d1261f786b5eebd88a0ca6360cccfaca7",
-                "sha256:cedb2f9e1f990918ea061f28a0f0077a07702e3819602d3507e2ff98c8d20636",
-                "sha256:e8caf961e1b1a945db76f1b5fa9c91498d15f545ac0ababbe575cfab185d3bd8"
+                "sha256:08b3ba72bd981531fd557f67beee376d6700fba183b167857038997ba30dd297",
+                "sha256:2757fa64e11ec12220968f65d086b7a29b6583d16e9a544c889b22ba98555ef1",
+                "sha256:3102bb2c206700a7d28181dbe04d66b30780cde1d1c02c5f3c165cf3d2489497",
+                "sha256:3498b27d8236057def41de3585f317abae235dd3a11d33e01736ffedb2ef8606",
+                "sha256:378ac77af41350a8c6b8801a66021b52da8a05fd77e578b7380e876c0ce4f528",
+                "sha256:38f16b1317b8dd82df67ed5daa5f5e7c959e46579840d77a67a4ceb9cef0a50b",
+                "sha256:3911c2ef96e5ddc748a3c8b4702c61986628bb719b8378bf1e4a6184bbd48fe4",
+                "sha256:3a3c3f8863255f3c31db3889f8055989527173ef6192a283eb6f4db3c579d830",
+                "sha256:3b14b1da110ea50c8bcbadc3b82c3933974dbeea1832e814aab93ca1163cd4c1",
+                "sha256:535dc1e6e68fad5355f9984d5637c33badbdc987b0c0d303ee95a6c979c9516f",
+                "sha256:6f61319e33222591f885c598e3e24f6a4be3533c1d70c19e0dc59e83a71ce27d",
+                "sha256:723d22d324e7997a651478e9c5a3120a0ecbc9a7e94071f7e1954562a8806cf3",
+                "sha256:76b2775dda7e78680d688daabcb485dc87cf5e3184a0b3e012e1d40e38527cc8",
+                "sha256:782a5c7df9f91979a7a21792e09b34a658058896628217ae6362088b123c8500",
+                "sha256:7e4d159021c2029b958b2363abec4a11db0ce8cd43abb0d9ce44284cb97217e7",
+                "sha256:8dacc4073c359f40fcf73aede8428c35f84639baad7e1b46fce5ab7a8a7be4bb",
+                "sha256:8f33d1156241c43755137288dea619105477961cfa7e47f48dbf96bc2c30720b",
+                "sha256:8ffd4b204d7de77b5dd558cdff986a8274796a1e57813ed005b33fd97e29f059",
+                "sha256:93a280c9eb736a0dcca19296f3c30c720cb41a71b1f9e617f341f0a8e791a69b",
+                "sha256:9a4f66259bdd6964d8cf26142733c81fb562252db74ea367d9beb4f815478e72",
+                "sha256:9a9d4ff06804920388aab69c5ea8a77525cf165356db70131616acd269e19b36",
+                "sha256:a2070c5affdb3a5e751f24208c5c4f3d5f008fa04d28731416e023c93b275277",
+                "sha256:a4857f7e2bc6921dbd487c5c88b84f5633de3e7d416c4dc0bb70256775551a6c",
+                "sha256:a607ae05b6c96057ba86c811d9c43423f35e03874ffb03fbdcd45e0637e8b631",
+                "sha256:a66ca3bdf21c653e47f726ca57f46ba7fc1f260ad99ba783acc3e58e3ebdb9ff",
+                "sha256:ab110c48bc3d97b4d19af41865e14531f300b482da21783fdaacd159251890e8",
+                "sha256:b239711e774c8eb910e9b1ac719f02f5ae4bf35fa0420f438cdc3a7e4e7dd6ec",
+                "sha256:be0416074d7f253865bb67630cf7210cbc14eb05f4099cc0f82430135aaa7a3b",
+                "sha256:c46643970dff9f5c976c6512fd35768c4a3819f01f61169d8cdac3f9290903b7",
+                "sha256:c5ec71fd4a43b6d84ddb88c1df94572479d9a26ef3f150cef3dacefecf888105",
+                "sha256:c6e5174f8ca585755988bc278c8bb5d02d9dc2e971591ef4a1baabdf2d99589b",
+                "sha256:c89b558f8a9a5a6f2cfc923c304d49f0ce629c3bd85cb442ca258ec20366394c",
+                "sha256:cc44e3545d908ecf3e5773266c487ad1877be718d9dc65fc7eb6e7d14960985b",
+                "sha256:cc6f8246e74dd210d7e2b56c76ceaba1cc52b025cd75dbe96eb48791e0250e98",
+                "sha256:cd556c79ad665faeae28020a0ab3bda6cd47d94bec48e36970719b0b86e4dcf4",
+                "sha256:ce6f3a147b4b1a8b09aae48517ae91139b1b010c5f36423fa2b866a8b23df879",
+                "sha256:ceb499d2b3d1d7b7ba23abe8bf26df5f06ba8c71127f188333dddcf356b4b63f",
+                "sha256:cef06fb382557f66d81d804230c11ab292d94b840b3cb7bf4450778377b592f4",
+                "sha256:e448f56cfeae7b1b3b5bcd99bb377cde7c4eb1970a525c770720a352bc4c8044",
+                "sha256:e52d3d95df81c8f6b2a1685aabffadf2d2d9ad97203a40f8d61e51b70f191e4e",
+                "sha256:ee2f1d1c223c3d2c24e3afbb2dd38be3f03b1a8d6a83ee3d9eb8c36a52bee899",
+                "sha256:f2c6888eada180814b8583c3e793f3f343a692fc802546eed45f40a001b1169f",
+                "sha256:f51dbba78d68a44e99d484ca8c8f604f17e957c1ca09c3ebc2c7e3bbd9ba0448",
+                "sha256:f54de00baf200b4539a5a092a759f000b5f45fd226d6d25a76b0dff71177a714",
+                "sha256:fa10fee7e32213f5c7b0d6428ea92e3a3fdd6d725590238a3f92c0de1c78b9d2",
+                "sha256:fabeeb121735d47d8eab8671b6b031ce08514c86b7ad8f7d5490a7b6dcd6267d",
+                "sha256:fac3c432851038b3e6afe086f777732bcf7f6ebbfd90951fa04ee53db6d0bcdd",
+                "sha256:fda29412a66099af6d6de0baa6bd7c52674de177ec2ad2630ca264142d69c6c7",
+                "sha256:ff1330e8bc996570221b450e2d539134baa9465f5cb98aff0e0f73f34172e0ae"
             ],
             "index": "pypi",
-            "version": "==5.3"
+            "version": "==5.3.1"
         },
         "distlib": {
             "hashes": [
@@ -560,11 +213,11 @@
         },
         "flake8-bugbear": {
             "hashes": [
-                "sha256:a3ddc03ec28ba2296fc6f89444d1c946a6b76460f859795b35b77d4920a51b63",
-                "sha256:bd02e4b009fb153fe6072c31c52aeab5b133d508095befb2ffcf3b41c4823162"
+                "sha256:528020129fea2dea33a466b9d64ab650aa3e5f9ffc788b70ea4bc6cf18283538",
+                "sha256:f35b8135ece7a014bc0aee5b5d485334ac30a6da48494998cc1fabf7ec70d703"
             ],
             "index": "pypi",
-            "version": "==20.1.4"
+            "version": "==20.11.1"
         },
         "flake8-docstrings": {
             "hashes": [
@@ -607,11 +260,11 @@
         },
         "flake8-tidy-imports": {
             "hashes": [
-                "sha256:62059ca07d8a4926b561d392cbab7f09ee042350214a25cf12823384a45d27dd",
-                "sha256:c30b40337a2e6802ba3bb611c26611154a27e94c53fc45639e3e282169574fd3"
+                "sha256:52e5f2f987d3d5597538d5941153409ebcab571635835b78f522c7bf03ca23bc",
+                "sha256:76e36fbbfdc8e3c5017f9a216c2855a298be85bc0631e66777f4e6a07a859dc4"
             ],
             "index": "pypi",
-            "version": "==4.1.0"
+            "version": "==4.2.1"
         },
         "flake8-todo": {
             "hashes": [
@@ -622,11 +275,11 @@
         },
         "identify": {
             "hashes": [
-                "sha256:5dd84ac64a9a115b8e0b27d1756b244b882ad264c3c423f42af8235a6e71ca12",
-                "sha256:c9504ba6a043ee2db0a9d69e43246bc138034895f6338d5aed1b41e4a73b1513"
+                "sha256:18994e850ba50c37bcaed4832be8b354d6a06c8fb31f54e0e7ece76d32f69bc8",
+                "sha256:892473bf12e655884132a3a32aca737a3cbefaa34a850ff52d501773a45837bc"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==1.5.9"
+            "version": "==1.5.12"
         },
         "junit-xml": {
             "hashes": [
@@ -685,16 +338,17 @@
                 "sha256:06a0d7ba600ce0b2d2fe2e78453a470b5a6e000a985dd4a4e54e436cc36b0e97",
                 "sha256:240097ff019d7c70a4922b6869d8a86407758333f02203e0fc6ff79c5dcede76",
                 "sha256:4f4b913ca1a7319b33cfb1369e91e50354d6f07a135f3b901aca02aa95940bd2",
+                "sha256:6034f55dab5fea9e53f436aa68fa3ace2634918e8b5994d82f3621c04ff5ed2e",
                 "sha256:69f00dca373f240f842b2931fb2c7e14ddbacd1397d57157a9b005a6a9942648",
                 "sha256:73f099454b799e05e5ab51423c7bcf361c58d3206fa7b0d555426b1f4d9a3eaf",
                 "sha256:74809a57b329d6cc0fdccee6318f44b9b8649961fa73144a98735b0aaf029f1f",
                 "sha256:7739fc0fa8205b3ee8808aea45e968bc90082c10aef6ea95e855e10abf4a37b2",
                 "sha256:95f71d2af0ff4227885f7a6605c37fd53d3a106fcab511b8860ecca9fcf400ee",
+                "sha256:ad9c67312c84def58f3c04504727ca879cb0013b2517c85a9a253f0cb6380c0a",
                 "sha256:b8eac752c5e14d3eca0e6dd9199cd627518cb5ec06add0de9d32baeee6fe645d",
                 "sha256:cc8955cfbfc7a115fa81d85284ee61147059a753344bc51098f3ccd69b0d7e0c",
                 "sha256:d13155f591e6fcc1ec3b30685d50bf0711574e2c0dfffd7644babf8b5102ca1a"
             ],
-            "index": "pypi",
             "version": "==5.3.1"
         },
         "six": {
@@ -717,16 +371,16 @@
                 "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b",
                 "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"
             ],
-            "index": "pypi",
+            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.10.2"
         },
         "virtualenv": {
             "hashes": [
-                "sha256:b0011228208944ce71052987437d3843e05690b2f23d1c7da4263fde104c97a2",
-                "sha256:b8d6110f493af256a40d65e29846c69340a947669eec8ce784fcf3dd3af28380"
+                "sha256:54b05fc737ea9c9ee9f8340f579e5da5b09fb64fd010ab5757eb90268616907c",
+                "sha256:b7a8ec323ee02fb2312f098b6b4c9de99559b462775bc8fe3627a73706603c1b"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==20.1.0"
+            "version": "==20.2.2"
         }
     }
 }
diff --git a/README.md b/README.md
index 187d029..af63615 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,27 @@ docker run --ipc=none --privileged -p 8060:8060 ghcr.io/python-discord/snekbox
 
 To run it in the background, use the `-d` option. See the documentation on [`docker run`] for more information.
 
-The above command will make the API accessible on the host via `http://localhost:8060/`. Currently there's only one endpoint: `http://localhost:8060/eval`.
+The above command will make the API accessible on the host via `http://localhost:8060/`. Currently, there's only one endpoint: `http://localhost:8060/eval`.
+
+## Third-party Packages
+
+By default, the Python interpreter has no access to any packages besides the
+standard library. Even snekbox's own dependencies like Falcon and Gunicorn are
+not exposed.
+
+To expose third-party Python packages during evaluation, install them to the user site:
+
+```sh
+docker exec snekbox /bin/sh -c 'pip install --ignore-installed --user numpy' 
+```
+
+In the above command, `snekbox` is the name of the running container. The name may be different and can be checked with `docker ps`.
+
+It's important to use `--user` to install them to the user site, whose base is located at `/snekbox/user_base` within the Docker container. To persist the installed packages, a volume for the directory can be created with Docker. For an example, see [`docker-compose.yml`].
+
+`--ignore-installed` is only necessary if installing a package that happens to
+be a dependency of snekbox. Normally, pip would reject the installation because
+it doesn't make a distinction here between the global and user sites.
 
 ## Development Environment
 
@@ -148,6 +168,7 @@ The alias can be found in `./scripts/.profile`, which is automatically added whe
 [`snekbox.cfg`]: config/snekbox.cfg
 [`snekapi.py`]: snekbox/api/snekapi.py
 [`resources`]: snekbox/api/resources
+[`docker-compose.yml`]: docker-compose.yml
 [`docker run`]: https://docs.docker.com/engine/reference/commandline/run/
 [nsjail]: https://github.com/google/nsjail
 [falcon]: https://falconframework.org/
diff --git a/config/snekbox.cfg b/config/snekbox.cfg
index 27caf27..aa39059 100644
--- a/config/snekbox.cfg
+++ b/config/snekbox.cfg
@@ -14,6 +14,7 @@ envar: "OPENBLAS_NUM_THREADS=1"
 envar: "MKL_NUM_THREADS=1"
 envar: "VECLIB_MAXIMUM_THREADS=1"
 envar: "NUMEXPR_NUM_THREADS=1"
+envar: "PYTHONPATH=/snekbox/user_base/lib/python3.9/site-packages"
 
 keep_caps: false
 
@@ -114,5 +115,5 @@ iface_no_lo: true
 
 exec_bin {
     path: "/usr/local/bin/python"
-    arg: "-Iqu"
+    arg: "-Squ"
 }
diff --git a/deployment.yaml b/deployment.yaml
index b2ec0fd..0476072 100644
--- a/deployment.yaml
+++ b/deployment.yaml
@@ -20,3 +20,37 @@ spec:
             - containerPort: 8060
           securityContext:
             privileged: true
+          volumeMounts:
+            - name: snekbox-user-base-volume
+              mountPath: /snekbox/user_base
+          lifecycle:
+            postStart:
+              exec:
+                command:
+                  - "bin/sh"
+                  - "-c"
+                  - >-
+                    pip install --user
+                    arrow~=0.17
+                    attrs~=20.3
+                    beautifulsoup4~=4.9
+                    forbiddenfruit~=0.1
+                    fuzzywuzzy~=0.18
+                    lark~=0.10
+                    more-itertools~=8.6
+                    networkx~=2.5
+                    numpy~=1.19
+                    pandas~=1.1
+                    pendulum~=2.1
+                    python-dateutil~=2.8
+                    python-levenshtein~=0.12.0
+                    pyyaml~= 5.3
+                    scipy~=1.5
+                    sympy~=1.6
+                    toml~=0.10
+                    yarl~=1.6
+      volumes:
+        - name: snekbox-user-base-volume
+          hostPath:
+            path: /snekbox_dep_cache
+            type: Directory
diff --git a/docker-compose.yml b/docker-compose.yml
index 3062af3..a7747a6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,4 +1,5 @@
 version: "3.7"
+
 services:
   snekbox:
     container_name: snekbox
@@ -11,3 +12,8 @@ services:
     build:
       context: .
       dockerfile: Dockerfile
+    volumes:
+      - user-base:/snekbox/user_base
+
+volumes:
+  user-base:
diff --git a/scripts/.profile b/scripts/.profile
index 9bf8e09..11c8d78 100644
--- a/scripts/.profile
+++ b/scripts/.profile
@@ -17,5 +17,5 @@ nsjpy() {
     nsjail \
         --config "${NSJAIL_CFG:-/snekbox/config/snekbox.cfg}" \
         $nsj_args -- \
-        /usr/local/bin/python -Iqu -c "$@"
+        /usr/local/bin/python -Squ -c "$@"
 }
diff --git a/snekbox/nsjail.py b/snekbox/nsjail.py
index cc1f682..2e38db1 100644
--- a/snekbox/nsjail.py
+++ b/snekbox/nsjail.py
@@ -152,7 +152,7 @@ class NsJail:
                 "--cgroup_pids_mount", str(CGROUP_PIDS_PARENT.parent),
                 "--cgroup_pids_parent", CGROUP_PIDS_PARENT.name,
                 "--",
-                self.python_binary, "-Iqu", "-c", code
+                self.python_binary, "-Squ", "-c", code
             )
 
             msg = "Executing code..."