import os.path
os.path.exists(path)
import os.path
>>> print os.path.isfile("/etc/password.txt")
True
>>> print os.path.isfile("/etc")
False
>>> print os.path.exists("/etc/password.txt")
True
>>> print os.path.exists("/etc")
True
try:
with open('path/to/file,'r') as fp:
fp.readline()
print('Файл найден!')
except:
print('Файл не найден!')
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