问题
Do you know any library that will help doing that?
I would write a function that prints the differences between two multiline strings in the unified diff format. Something like that:
def print_differences(string1, string2):
"""
Prints the comparison of string1 to string2 as unified diff format.
"""
???
An usage example is the following:
string1="""
Usage: trash-empty [days]
Purge trashed files.
Options:
--version show program's version number and exit
-h, --help show this help message and exit
"""
string2="""
Usage: trash-empty [days]
Empty the trash can.
Options:
--version show program's version number and exit
-h, --help show this help message and exit
Report bugs to http://code.google.com/p/trash-cli/issues
"""
print_differences(string1, string2)
This should print something like that:
--- string1
+++ string2
@@ -1,6 +1,6 @@
Usage: trash-empty [days]
-Purge trashed files.
+Empty the trash can.
Options:
--version show program's version number and exit
回答1:
This is how I solved:
def _unidiff_output(expected, actual):
"""
Helper function. Returns a string containing the unified diff of two multiline strings.
"""
import difflib
expected=expected.splitlines(1)
actual=actual.splitlines(1)
diff=difflib.unified_diff(expected, actual)
return ''.join(diff)
回答2:
Did you have a look at the built-in python module difflib? Have a look that this example
来源：https://stackoverflow.com/questions/845276/how-to-print-the-comparison-of-two-multiline-strings-in-unified-diff-format