# ERROR: Invalid requirement: 'requests===2.31.0'

- **ID:** `python/pip-invalid-requirement-double-equals`
- **Domain:** python
- **Category:** install_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

The requirement string uses three equals signs which is not a valid PEP 440 version specifier. pip only supports ==, >=, <=, ~=, !=, <, >, and === (arbitrary equality) requires exact string match against the full version.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.8 | active | — | — |
| 3.9 | active | — | — |
| 3.10 | active | — | — |
| 3.11 | active | — | — |
| 3.12 | active | — | — |

## Workarounds

1. **** (98% success)
   ```
   pip install 'requests==2.31.0'
   ```
2. **** (85% success)
   ```
   pip install 'somepkg===1.0.0+localbuild'
   ```

## Dead Ends

- **** — The triple-equals syntax is valid PEP 440 but rarely what users want; upgrading pip does not change the parser's semantics. (75% fail)
- **** — Quoting is not the issue—the operator itself is wrong for the intent. (90% fail)