如何将指定Bash脚本转换为Python脚本？尝试bash2py未成功

I get that bash2py didn't work out for you—let's manually translate that Bash script to Python step by step, since the original script has some shell-specific behaviors we need to replicate properly.

Here's a Python equivalent that mirrors every step of your original Bash script, with added robustness for error checking:

import os
import subprocess
from datetime import datetime

# Set locale environment variables to match the Bash script
os.environ['LANG'] = 'en_US.UTF-8'
os.environ['LC_ALL'] = 'en_US.UTF-8'

# Print sync start timestamp (matches `echo Starting carddav sync at $(date)`)
print(f"Starting carddav sync at {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}")

# Create carddav directory if it doesn't exist (replicates `mkdir -p carddav`)
os.makedirs('carddav', exist_ok=True)

# Read template file, replace environment variables, write config file
# This replaces the `cat ... | sed ... > vdirsyncer.config` pipeline
with open('vdirsyncer.config.template', 'r') as template_file:
    template_content = template_file.read()

# Fetch required environment variables with validation
vdir_user = os.getenv('VDIRSYNC_USER')
vdir_pass = os.getenv('VDIRSYNC_PASS')
if not vdir_user or not vdir_pass:
    raise ValueError("VDIRSYNC_USER and VDIRSYNC_PASS environment variables must be set")

# Replace placeholders in the template
config_content = template_content.replace('VDIRSYNC_USER', vdir_user).replace('VDIRSYNC_PASS', vdir_pass)

with open('vdirsyncer.config', 'w') as config_file:
    config_file.write(config_content)

# Run vdirsyncer discover with automatic "yes" confirmation (replicates `yes | ...`)
discover_process = subprocess.run(
    ['vdirsyncer', '-c', 'vdirsyncer.config', 'discover'],
    input=b'yes\n',
    capture_output=True,
    text=True
)
# Optional: Print output for debugging
print(discover_process.stdout)
if discover_process.stderr:
    print(f"Discover errors: {discover_process.stderr}")

# Run vdirsyncer sync
sync_process = subprocess.run(
    ['vdirsyncer', '-c', 'vdirsyncer.config', 'sync'],
    capture_output=True,
    text=True
)
print(sync_process.stdout)
if sync_process.stderr:
    print(f"Sync errors: {sync_process.stderr}")

# Clean up the temporary config file (replicates `rm vdirsyncer.config`)
os.remove('vdirsyncer.config')

# Print completion message
print("Carddav sync done, starting carddavsync")

Key Details About the Translation: #

• Environment Variables: We use os.environ to set locale variables, just like the Bash script. We also add a check to ensure VDIRSYNC_USER and VDIRSYNC_PASS are set (the original Bash script would fail silently if these are missing, making the Python version more reliable).
• Directory Creation: os.makedirs('carddav', exist_ok=True) behaves exactly like mkdir -p carddav—it creates the directory and doesn't throw an error if it already exists.
• Template Replacement: Instead of relying on sed (which can have syntax differences across systems), we read the template directly and use Python's string replacement to swap placeholders. This makes the script more portable.
• Automatic Confirmation: The input=b'yes\n' parameter in subprocess.run simulates piping yes into the vdirsyncer discover command, answering any prompts automatically.
• Command Output: We capture and print command output to help with debugging (you can remove these print statements if you don't need them).

内容的提问来源于stack exchange，提问作者hawar