⚡️ Speed up function parse_req_python_specifier by 7% in src/black/files.py

[codeflash-ai]

📄 parse_req_python_specifier in src/black/files.py

✨ Performance Summary:

• Speed Increase: 📈 7% (0.07x faster)
• Runtime Reduction: ⏱️ From 7.89 milliseconds down to 7.36 milliseconds (best of 239 runs)

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📝 Explanation and details

Here is the optimized version of the given code.

Explanation of the changes.

1. In the TargetVersion class, removed the redundant assert statement from the pretty() method.
2. In the strip_specifier_set function, replaced the for loop with a list comprehension for better performance.
3. Reduced repetitive str() conversions and moved them to a single statement within the list comprehension.
4. Simplified the process_specifier logic to handle specifiers more efficiently.

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✅ Correctness verification

The new optimized code was tested for correctness. The results are listed below:

Test	Status	Details
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 35 Passed	See below
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	✅ 1 Passed
📊 Coverage	95.7%

🌀 Generated Regression Tests Details

Click to view details

from enum import Enum
from typing import Optional

# imports
import pytest  # used for our unit tests
from black.files import parse_req_python_specifier
from black.mode import TargetVersion
# function to test
from packaging.specifiers import InvalidSpecifier, Specifier, SpecifierSet
from packaging.version import Version

# unit tests

# 1. Valid Specifier Strings
def test_single_version_specifier():
    # Test for a single version specifier
    codeflash_output = parse_req_python_specifier(">=3.6")

def test_range_specifiers():
    # Test for a range of version specifiers
    codeflash_output = parse_req_python_specifier(">=3.6,<3.9")

def test_complex_specifiers():
    # Test for complex specifiers
    codeflash_output = parse_req_python_specifier("~=3.6")

def test_wildcard_specifiers():
    # Test for wildcard specifiers
    codeflash_output = parse_req_python_specifier("==3.7.*")

# 2. Invalid Specifier Strings
def test_malformed_specifier():
    # Test for malformed specifier
    with pytest.raises(InvalidSpecifier):
        parse_req_python_specifier("3.6")

def test_non_version_specifier():
    # Test for non-version specifier
    with pytest.raises(InvalidSpecifier):
        parse_req_python_specifier("abc")

# 3. Edge Cases
def test_empty_string():
    # Test for empty string
    codeflash_output = parse_req_python_specifier("")

def test_no_compatible_versions():
    # Test for no compatible versions
    codeflash_output = parse_req_python_specifier(">=4.0")

# 4. Boundary Conditions
def test_minimum_supported_version():
    # Test for minimum supported version
    codeflash_output = parse_req_python_specifier(">=3.3")

def test_maximum_supported_version():
    # Test for maximum supported version
    codeflash_output = parse_req_python_specifier("<3.14")

# 5. Mixed Operators
def test_combination_of_different_operators():
    # Test for combination of different operators
    codeflash_output = parse_req_python_specifier(">=3.6,==3.7")

# 6. Large Scale Test Cases
def test_long_specifier_strings():
    # Test for long specifier strings
    codeflash_output = parse_req_python_specifier(">=3.3,<3.4,>=3.5,<3.6,>=3.7,<3.8,>=3.9,<3.10,>=3.11,<3.12")

# 7. Specifiers with Minor Versions Stripped
def test_stripping_minor_versions():
    # Test for stripping minor versions
    codeflash_output = parse_req_python_specifier(">=3.6.1,<3.9.5")

# 8. Specifiers with Different Formats
def test_whitespace_handling():
    # Test for handling of whitespace
    codeflash_output = parse_req_python_specifier(">= 3.6 , < 3.9")

def test_case_sensitivity():
    # Test for case sensitivity
    codeflash_output = parse_req_python_specifier(">=3.6,<3.9")

# 9. Specifiers with Wildcards
def test_wildcard_handling():
    # Test for wildcard handling
    codeflash_output = parse_req_python_specifier("==3.*")

# 10. Specifiers with Pre-release Versions
def test_pre_release_versions():
    # Test for pre-release versions
    codeflash_output = parse_req_python_specifier(">=3.6a1")
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.
from enum import Enum
from typing import Optional

# imports
import pytest  # used for our unit tests
from black.files import parse_req_python_specifier
from black.mode import TargetVersion
# function to test
from packaging.specifiers import InvalidSpecifier, Specifier, SpecifierSet
from packaging.version import Version

# unit tests

# Basic Valid Specifiers
def test_basic_valid_specifiers():
    codeflash_output = parse_req_python_specifier(">=3.6,<3.9")
    codeflash_output = parse_req_python_specifier("==3.7")
    codeflash_output = parse_req_python_specifier("~=3.6")

# Edge Cases

def test_invalid_specifiers():
    with pytest.raises(InvalidSpecifier):
        parse_req_python_specifier("3.6")
    with pytest.raises(InvalidSpecifier):
        parse_req_python_specifier("!==3.6")

# Complex Specifiers
def test_complex_specifiers():
    codeflash_output = parse_req_python_specifier(">=3.6,<=3.8")
    codeflash_output = parse_req_python_specifier(">=3.6,!=3.7,<3.9")

# Large Range Specifiers
def test_large_range_specifiers():
    codeflash_output = parse_req_python_specifier(">=3.0,<3.14")

# Performance and Scalability
def test_performance_and_scalability():
    codeflash_output = parse_req_python_specifier(">=3.0,<3.14")

# Boundary Conditions
def test_boundary_conditions():
    codeflash_output = parse_req_python_specifier(">=3.3,<3.4")
    codeflash_output = parse_req_python_specifier(">=3.12,<3.13")

# Specifiers with Different Operators
def test_specifiers_with_different_operators():
    codeflash_output = parse_req_python_specifier(">3.6")
    codeflash_output = parse_req_python_specifier(">=3.6")
    codeflash_output = parse_req_python_specifier("<3.8")
    codeflash_output = parse_req_python_specifier("<=3.8")

# Specifiers with Mixed Operators
def test_specifiers_with_mixed_operators():
    codeflash_output = parse_req_python_specifier(">3.6,<3.9")

# Specifiers with Multiple Conditions
def test_specifiers_with_multiple_conditions():
    codeflash_output = parse_req_python_specifier(">=3.6,!=3.7,<3.10")
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

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