Python – How to check if a file exists
In Python, we can use os.path.isfile()
or pathlib.Path.is_file()
(Python 3.4) to check if a file exists.
1. pathlib
New in Python 3.4
from pathlib import Path
fname = Path("c:\\test\\abc.txt")
print(fname.exists()) # true
print(fname.is_file()) # true
print(fname.is_dir()) # false
dir = Path("c:\\test\\")
print(dir.exists()) # true
print(dir.is_file()) # false
print(dir.is_dir()) # true
If check
from pathlib import Path
fname = Path("c:\\test\\abc.txt")
if fname.is_file():
print("file exist!")
else:
print("no such file!")
2. os.path
A classic os.path
examples.
import os.path
fname = "c:\\test\\abc.txt"
print(os.path.exists(fname)) # true
print(os.path.isfile(fname)) # true
print(os.path.isdir(fname)) # false
dir = "c:\\test\\"
print(os.path.exists(dir)) # true
print(os.path.isfile(dir)) # false
print(os.path.isdir(dir)) # true
If check.
import os.path
fname = "c:\\test\\abc.txt"
if os.path.isfile(fname):
print("file exist!")
else:
print("no such file!")
3. Try: Except
We can also use the try except
to check if a file exists.
fname = "c:\\test\\no-such-file.txt"
try:
with open(fname) as file:
for line in file:
print(line, end='')
except IOError as e:
print(e)
Output
[Errno 2] No such file or directory: 'c:\\test\\no-such-file.txt'
References
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