automate pypi statistics tracking and figure updates

* deleting the pypistat ipynb as functionality is moved to a script
* add action to run script monthly

.github/workflows/get_pypi_stats.yml

@@ -0,0 +1,37 @@
+name: Get PyPi Stats
+on:
+  schedule:
+    # runs once a month on the first
+    - cron: "55 20 1 * *"
+  # Trigger manually at https://github.com/icesat2py/icepyx/actions/workflows/get_pypi_stats.yml
+  workflow_dispatch:
+
+jobs:
+  # This workflow contains a single job called "pypi_stats"
+  pypi_stats:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+    if: github.repository_owner == 'icesat2py'
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+    - uses: actions/checkout@v2
+      with:
+        ref: "traffic"
+
+    # Calculates pypi stats and clones and stores in CSV file
+    - name: Update pypi stats files
+      run: |
+        pip install -r requirements.txt
+        python ./doc/source/tracking/pypistats/get_pypi_stats.py
+
+    # Commits files to repository
+    - name: Commit changes
+      uses: EndBug/add-and-commit@v7
+      with:
+        author_name: learn2phoenix
+        message: "Pypi stats auto-update"
+        add: "./doc/source/tracking/pypistats/*"
+#         add: "./pypistats/*"
+        branch: "traffic"  # commits to branch "traffic"

doc/source/tracking/pypistats/get_pypi_stats.py

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+import os
+import pypistats
+import pandas as pd
+
+cwd = os.getcwd()
+
+trackpath = f'{cwd}/doc/source/tracking/pypistats/'
+downloadfn = "downloads_data.csv"
+sysdownloadfn = "sys_downloads_data.csv"
+
+downloads = pypistats.overall("icepyx", format="pandas").drop(columns=['percent'])
+downloads = downloads[downloads.category != "Total"]
+
+# try:
+exist_downloads = pd.read_csv(trackpath + downloadfn)  # .drop(columns=['percent'])
+# exist_downloads = exist_downloads[exist_downloads.category != "Total"]
+dl_data = downloads.merge(exist_downloads, how='outer',
+                          on=['category', 'date', 'downloads']).reindex()
+# except:
+#     dl_data = downloads
+
+dl_data.to_csv(trackpath + downloadfn, index=False)
+
+sysdownloads = pypistats.system("icepyx", format="pandas").drop(columns=['percent'])
+sysdownloads = sysdownloads[sysdownloads.category != "Total"]
+# try:
+exist_sysdownloads = pd.read_csv(trackpath + sysdownloadfn)  # .drop(columns=['percent'])
+# exist_sysdownloads = exist_sysdownloads[exist_sysdownloads.category != "Total"]
+exist_sysdownloads['category'] = exist_sysdownloads['category'].fillna("null")
+sysdl_data = sysdownloads.merge(exist_sysdownloads, how='outer',
+                                on=['category', 'date', 'downloads']).reindex()
+# except:
+#     dl_data = sysdownloads
+
+sysdl_data.to_csv(trackpath + sysdownloadfn, index=False)
+
+dl_data = dl_data.groupby("category").get_group("without_mirrors").sort_values("date")
+
+chart = dl_data.plot(x="date", y="downloads", figsize=(10, 2),
+                     label="Number of PyPI Downloads")
+chart.figure.savefig(trackpath + "downloads.svg")