Python 3跨目录导入.py文件问题求助（Windows 10 64位）

Hey there, let's get that import working for you! The problem you're hitting is likely related to how Windows handles file paths in Python—those backslashes (\) can cause unexpected behavior because they're treated as escape characters. Here are a few solid fixes to try:

1. Use Raw String Literals for the Path #

Raw strings ignore escape sequences, so just add an r before your path string to make Python read it exactly as written:

import sys
sys.path.insert(0, r'A:\code\importThisFolder')
import importThisFile

2. Double Up the Backslashes #

If you don't want to use raw strings, replace each single backslash with two—this tells Python to treat them as literal backslashes:

import sys
sys.path.insert(0, 'A:\\code\\importThisFolder')
import importThisFile

3. Use Forward Slashes Instead #

Python accepts forward slashes even on Windows, which avoids escape character issues entirely:

import sys
sys.path.insert(0, 'A:/code/importThisFolder')
import importThisFile

Quick Verification Step #

After modifying the path, you can double-check if the folder was added correctly by printing sys.path:

import sys
print(sys.path)

Look for A:\code\importThisFolder (or the formatted version you used) in the output to confirm it's in the list of paths Python checks for imports.

One last quick check: make sure importThisFolder has an empty __init__.py file. Python requires this to recognize the folder as an importable package—just create a blank text file named __init__.py in that folder if it's missing, it often fixes hidden import hiccups.

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