方法一：迭代
import os
def count_file(path):
count = 0
for dir in os.listdir(path):
if os.path.isfile(os.path.join(path, dir)):
count += 1
else:
count += count_file(os.path.join(path, dir))
return count
方法二：os.walk()
import os
def count_file(path):
for dir in os.listdir(path):
count = 0
for root, dirs, files in os.walk(os.path.join(path, dir)):
count += len(files)
return(count)
