How does Claude Code use Python? 3,790 python3 calls. 55.9% are inline one-liners (-c flag). python -m py_compile runs 703 times — syntax checking as a quality gate. pip called only 5 times.
python3 call analysis across all your sessions.
npx cc-python
No install. No dependencies.
- Total python calls — across all sessions
- How Python is used — inline (-c), module (-m), script (.py) breakdown
- Top -m modules — py_compile, pytest, and others
- Most imported modules — what Claude imports in inline code
- Most run scripts — which .py files get executed most
cc-python — Python Call Analysis
════════════════════════════════════════
▸ Overview
Total python calls: 3,790
Sessions with Python: 288
Inline (-c/heredoc): 2,120 (55.9%)
Module (-m): 1,224 (32.3%)
Script (.py): 345 (9.1%)
pip install: 5
▸ How Python is used
Inline (-c/heredoc) ████████████████ 55.9% (2,120)
Module (-m) █████████░░░░░░░ 32.3% (1,224)
Script (.py) ███░░░░░░░░░░░░░ 9.1% (345)
▸ Top -m modules
py_compile ████████████████ 18.5% (703)
pytest ███████████░░░░░ 12.5% (472)
▸ Most imported modules (inline)
import json ████████████████ (468)
import yaml █████████████░░░ (392)
import re ████████░░░░░░░░ (220)
▸ Insights
55.9% inline — Claude uses Python as a shell scripting language.
python -m py_compile: 703 calls (18.5%) — syntax checking as a quality gate.
python -m pytest: 472 calls — automated test runs.
npx cc-python # terminal output
npx cc-python --json # JSON output for scripting
{
"version": "1.0.0",
"totalPythonCalls": 3790,
"sessionsWithPython": 288,
"inline": 2120,
"module": 1224,
"script": 345,
"pip": 5,
"inlinePct": 55.9,
"topModules": [
{ "mod": "py_compile", "count": 703 },
{ "mod": "pytest", "count": 472 }
],
"topImports": [
{ "module": "json", "count": 468 },
{ "module": "yaml", "count": 392 }
]
}Try it without installing: yurukusa.github.io/cc-python
Drag-drop your ~/.claude/projects/ folder (or any subfolder) to analyze.
Reads ~/.claude/projects/**/*.jsonl session transcripts and extracts every Bash tool call that starts with python or python3. Classifies each call into inline (-c flag or heredoc), module (-m), or script (.py file). Extracts import statements from inline code and script filenames from script calls. Zero external dependencies.
Part of cc-toolkit — 76 tools for understanding your Claude Code sessions.