Question

我根据我正在检查的文件的性质编写了一个自定义文件比较脚本。本质上，文件被读入字典，然后脚本尝试对行进行散列以确定该行是否存在于另一个文件中。

f = open('test.txt', 'r')
f2 = open('test2.txt', 'r')

m1 = {}
m2 = {}
for line in f:
    m1[line] = line
for line2 in f2:
    m2[line2] = line2

for k in m1:
    try:
        l = m2[k]

    except KeyError:
        print m1[k]

f.close()
f2.close()

我在其中一个文件中放了一个垃圾线，但脚本没有打印出来。为什么没有检测到垃圾线？

Answer 1

遵循@ PeterWood的建议，

def get_line_set(fname):
    with open(fname) as inf:
        return set(line.rstrip() for line in inf)

f1 = get_line_set("test.txt")
f2 = get_line_set("test2.txt")

only_in_f1 = f1 - f2
if only_in_f1:
    print("\nThe following lines appear in f1 but not in f2:")
    print("\n".join(sorted(only_in_f1)))

only_in_f2 = f2 - f1
if only_in_f2:
    print("\nThe following lines appear in f2 but not in f1:")
    print("\n".join(sorted(only_in_f2)))

文件比较脚本不工作Python

1 个答案: