在Anaconda Prompt运行Python程序时出现cp949编码错误，求解决方法

Got it, let's tackle this encoding error you're facing! That UnicodeEncodeError happens because your system's default encoding (CP949, a Korean character set) can't handle the • character you're trying to write to your CSV file. The solution is exactly what was suggested: explicitly use UTF-8 encoding when opening files for writing (and reading, to avoid future issues) in myprogram.py.

Here's how to adjust your code based on how you're using the CSV module:

Case 1: Using csv.writer #

If your current code looks something like this (without encoding specified):

import csv

with open('your_output.csv', 'w') as f:
    writer = csv.writer(f)
    writer.writerow(['•', 'other_data'])  # This line triggers the error

Update it to specify UTF-8 encoding and add newline='' (this prevents extra blank lines in CSV files on Windows):

import csv

# Open file with UTF-8 encoding and proper newline handling
with open('your_output.csv', 'w', encoding='utf-8', newline='') as f:
    writer = csv.writer(f)
    writer.writerow(['•', 'other_data'])

Case 2: Using csv.DictWriter #

For dictionary-based CSV writing, the fix follows the same pattern:

import csv

with open('your_output.csv', 'w', encoding='utf-8', newline='') as f:
    fieldnames = ['special_char', 'data']
    writer = csv.DictWriter(f, fieldnames=fieldnames)
    
    writer.writeheader()
    writer.writerow({'special_char': '•', 'data': 'example'})

Bonus: For Regular Text Files (Non-CSV) #

If you're also reading/writing plain text files and want to avoid similar errors, apply the same encoding specification:

# Writing a text file with UTF-8
with open('output.txt', 'w', encoding='utf-8') as f:
    f.write('• This text will save correctly')

# Reading a text file with UTF-8 to avoid decoding issues
with open('input.txt', 'r', encoding='utf-8') as f:
    content = f.read()

Why this works: #

UTF-8 is a universal encoding that supports virtually all Unicode characters (including •), so bypassing your system's default CP949 encoding ensures your special characters are handled properly. The newline='' argument is a best practice for the CSV module on Windows, as it lets the module handle line endings correctly.

内容的提问来源于stack exchange，提问作者user67275