打开文本文件时“OSError：[Errno 36]文件名太长”

Question

I am trying to replace a number that is already in a text file with a new number. I opened the file and the name of the file I am opening is pretty short: "example_Na.chem", but I am still receiving the error that: OSError: [Errno 36] File name too long".

The code I am using is:

filename_chem = open('./input/example_Na/example_Na.chem', 'r').read()
input_file_chem = filename_chem.format(albeitSSA=albeitSSA)
    with open(filename_chem, 'w') as fid:
        fid.write(input_file_chem)

Answer 1

You are reading the content of the file ./input/example_Na/example_Na.chem and then using the file content as the file name for write-back, which can be too big for a file name. If you mean to write back the formatted content back to the same file you should open the same file name for writing instead:

filename_chem = open('./input/example_Na/example_Na.chem', 'r').read()
input_file_chem = filename_chem.format(albeitSSA=albeitSSA)
with open('./input/example_Na/example_Na.chem', 'w') as fid:
    fid.write(input_file_chem)