首先，您需要将字符串传递给difflib.SequenceMatcher，而不是文件：
# Like so
difflib.SequenceMatcher(None, str1, str2)
# Or just read the files in
difflib.SequenceMatcher(None, file1.read(), file2.read())
那会修复你的错误。
要获取第一个不匹配的字符串，请参阅difflib文档。
这是一个使用Python difflib比较两个文件内容的快速示例...
import difflib
file1 = "myFile1.txt"
file2 = "myFile2.txt"
diff = difflib.ndiff(open(file1).readlines(),open(file2).readlines())
print ''.join(diff),
请问两个文件是否都存在？
我刚刚测试了一下，结果很完美。
获取结果的方法类似于：
import difflib
diff=difflib.ndiff(open(testFile).readlines(), open(comparisonFile).readlines())
try:
while 1:
print diff.next(),
except:
pass
每行的第一个字符表示它们是否不同： 例如：'+' 表示接下来的行已添加，等等。
听起来你可能根本不需要使用difflib。如果你要逐行比较，请尝试像这样做：
test_lines = open("test.txt").readlines()
correct_lines = open("correct.txt").readlines()
for test, correct in zip(test_lines, correct_lines):
if test != correct:
print "Oh no! Expected %r; got %r." % (correct, test)
break
else:
len_diff = len(test_lines) - len(correct_lines)
if len_diff > 0:
print "Test file had too much data."
elif len_diff < 0:
print "Test file had too little data."
else:
print "Everything was correct!"
另一种更简单的方法是逐行检查两个文本文件是否相同。试试看。
fname1 = 'text1.txt'
fname2 = 'text2.txt'
f1 = open(fname1)
f2 = open(fname2)
lines1 = f1.readlines()
lines2 = f2.readlines()
i = 0
f1.seek(0)
f2.seek(0)
for line1 in f1:
if lines1[i] != lines2[i]:
print(lines1[i])
exit(0)
i = i+1
print("both are equal")
f1.close()
f2.close()
import filecmp
fname1 = 'text1.txt'
fname2 = 'text2.txt'
print(filecmp.cmp(fname1, fname2))
：）
# -*- coding: utf-8 -*-
"""
"""
def compare_lines_in_files(file1_path, file2_path):
try:
with open(file1_path, 'r', encoding='utf-8') as file1, open(file2_path, 'r', encoding='utf-8') as file2:
lines_file1 = file1.readlines()
lines_file2 = file2.readlines()
mismatched_lines = []
# Compare each line in file1 to all lines in file2
for line_num, line1 in enumerate(lines_file1, start=1):
line1 = line1.strip() # Remove leading/trailing whitespace
found_match = False
for line_num2, line2 in enumerate(lines_file2, start=1):
line2 = line2.strip() # Remove leading/trailing whitespace
# Perform a case-insensitive comparison
if line1.lower() == line2.lower():
found_match = True
break
if not found_match:
mismatched_lines.append(f"Line {line_num} in File 1: '{line1}' has no match in File 2")
# Compare each line in file2 to all lines in file1 (vice versa)
for line_num2, line2 in enumerate(lines_file2, start=1):
line2 = line2.strip() # Remove leading/trailing whitespace
found_match = False
for line_num, line1 in enumerate(lines_file1, start=1):
line1 = line1.strip() # Remove leading/trailing whitespace
# Perform a case-insensitive comparison
if line2.lower() == line1.lower():
found_match = True
break
if not found_match:
mismatched_lines.append(f"Line {line_num2} in File 2: '{line2}' has no match in File 1")
return mismatched_lines
except FileNotFoundError:
print("One or both files not found.")
return []
# Paths to the two text files you want to compare
file1_path = r'C:\Python Space\T1.txt'
file2_path = r'C:\Python Space\T2.txt'
mismatched_lines = compare_lines_in_files(file1_path, file2_path)
if mismatched_lines:
print("Differences between the files:")
for line in mismatched_lines:
print(line)
else:
print("No differences found between the files.")