如何不使用subprocess模块用Python实现文件筛选、名称处理及保存

Hey there! Instead of relying on shell commands via subprocess, you can use Python's built-in file system modules to get the same result—no external calls needed, and it's more cross-platform friendly too. Here are two clean approaches:

Modern Approach with pathlib (Python 3.4+) #

pathlib is the recommended way to handle file paths in modern Python. It's intuitive and object-oriented:

from pathlib import Path

# Set up your directory and output file paths
target_dir = Path("/root/test/")
output_path = target_dir / "testlist.txt"

# Find all files ending with .uwsgi.log (skip directories)
uwsgi_logs = [file for file in target_dir.glob("*.uwsgi.log") if file.is_file()]

# Strip the .uwsgi.log suffix from each filename
clean_names = [file.name[:-len(".uwsgi.log")] for file in uwsgi_logs]

# Write the result to your output file
# Use "\n".join for one name per line (matches shell command behavior)
# Use " ".join if you want space-separated names like your example output
with open(output_path, "w") as f:
    f.write("\n".join(clean_names))

Breakdown: #

• Path("/root/test/") creates a path object that handles directory paths cleanly.
• glob("*.uwsgi.log") searches for all files matching the exact suffix pattern.
• We add if file.is_file() to avoid accidentally including directories with the same name.
• file.name[:-len(".uwsgi.log")] removes the fixed suffix from each filename (since we know the exact length of the suffix we want to strip).

Traditional Approach with os Module #

If you're more familiar with the older os module, this works too:

import os

target_dir = "/root/test/"
output_path = os.path.join(target_dir, "testlist.txt")

# Get all entries in the directory, filter for files ending with .uwsgi.log
all_entries = os.listdir(target_dir)
uwsgi_logs = [
    filename for filename in all_entries
    if os.path.isfile(os.path.join(target_dir, filename))
    and filename.endswith(".uwsgi.log")
]

# Strip the suffix
clean_names = [filename[:-len(".uwsgi.log")] for filename in uwsgi_logs]

# Write to output file
with open(output_path, "w") as f:
    f.write("\n".join(clean_names))

Why This Is Better Than subprocess: #

• Cross-platform: Works on Windows, macOS, and Linux without changing code (your shell command is Unix-only).
• Error handling: You can easily add try/except blocks to handle missing directories, permission issues, etc.
• Readability: The code clearly shows what you're doing, instead of relying on shell pipeline syntax that might be harder to debug.

内容的提问来源于stack exchange，提问作者gumluvinisgoodluvin