Script doesn't read file
up vote
-1
down vote
favorite
I have a problem with the read() function in Python, it just doesn't read the file:
with open("D:\Joseph\pythontest.txt", "w+") as f:
f.write("Hello World")
print(f.read())
It doesn't show anything in the output (not even an error), just finishes the program.
screenshot of code in Sublime IDE showing nothing printed
python file io
edited Nov 11 at 19:15
martineau
65.3k988177
asked Nov 11 at 18:54
Joseph
81
add a comment |
up vote
-1
down vote
favorite
I have a problem with the read() function in Python, it just doesn't read the file:
with open("D:\Joseph\pythontest.txt", "w+") as f:
f.write("Hello World")
print(f.read())
It doesn't show anything in the output (not even an error), just finishes the program.
screenshot of code in Sublime IDE showing nothing printed
python file io
edited Nov 11 at 19:15
martineau
65.3k988177
asked Nov 11 at 18:54
Joseph
81
Files don't work the way you seem to think—their contents can't be randomly written and read the way you're trying to do it. See Reading and Writing Files in the documentation for more information.
– martineau
Nov 11 at 19:21
add a comment |
up vote
-1
down vote
favorite
up vote
-1
down vote
favorite
I have a problem with the read() function in Python, it just doesn't read the file:
with open("D:\Joseph\pythontest.txt", "w+") as f:
f.write("Hello World")
print(f.read())
It doesn't show anything in the output (not even an error), just finishes the program.
screenshot of code in Sublime IDE showing nothing printed
python file io
edited Nov 11 at 19:15
martineau
65.3k988177
asked Nov 11 at 18:54
Joseph
81
I have a problem with the read() function in Python, it just doesn't read the file:
with open("D:\Joseph\pythontest.txt", "w+") as f:
f.write("Hello World")
print(f.read())
It doesn't show anything in the output (not even an error), just finishes the program.
screenshot of code in Sublime IDE showing nothing printed
python file io
python file io
edited Nov 11 at 19:15
martineau
65.3k988177
asked Nov 11 at 18:54
Joseph
81
edited Nov 11 at 19:15
martineau
65.3k988177
asked Nov 11 at 18:54
Joseph
81
edited Nov 11 at 19:15
martineau
65.3k988177
edited Nov 11 at 19:15
martineau
65.3k988177
edited Nov 11 at 19:15
martineau
65.3k988177
65.3k988177
asked Nov 11 at 18:54
Joseph
81
asked Nov 11 at 18:54
Joseph
81
asked Nov 11 at 18:54
Joseph
81
81
Files don't work the way you seem to think—their contents can't be randomly written and read the way you're trying to do it. See Reading and Writing Files in the documentation for more information.
– martineau
Nov 11 at 19:21
add a comment |
Files don't work the way you seem to think—their contents can't be randomly written and read the way you're trying to do it. See Reading and Writing Files in the documentation for more information.
– martineau
Nov 11 at 19:21
Files don't work the way you seem to think—their contents can't be randomly written and read the way you're trying to do it. See Reading and Writing Files in the documentation for more information.
– martineau
Nov 11 at 19:21
Files don't work the way you seem to think—their contents can't be randomly written and read the way you're trying to do it. See Reading and Writing Files in the documentation for more information.
– martineau
Nov 11 at 19:21
add a comment |
2 Answers
2
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oldest
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0
down vote
accepted
You are writing to the file, but you didn't go back in the file. The "cursor" is located after what you wrote.
Try f.seek(0) to go at the beginning of your file after writing to it.
answered Nov 11 at 18:57
Matthieu Brucher
10.5k21935
add a comment |
up vote
0
down vote
Your code is trying to write it as you have ”w+” as a second param of open() call. Please use the open without the second parameter.
answered Nov 11 at 18:58
Ville Laitila
734513
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
accepted
You are writing to the file, but you didn't go back in the file. The "cursor" is located after what you wrote.
Try f.seek(0) to go at the beginning of your file after writing to it.
answered Nov 11 at 18:57
Matthieu Brucher
10.5k21935
add a comment |
up vote
0
down vote
accepted
You are writing to the file, but you didn't go back in the file. The "cursor" is located after what you wrote.
Try f.seek(0) to go at the beginning of your file after writing to it.
answered Nov 11 at 18:57
Matthieu Brucher
10.5k21935
add a comment |
up vote
0
down vote
accepted
up vote
0
down vote
accepted
You are writing to the file, but you didn't go back in the file. The "cursor" is located after what you wrote.
Try f.seek(0) to go at the beginning of your file after writing to it.
answered Nov 11 at 18:57
Matthieu Brucher
10.5k21935
You are writing to the file, but you didn't go back in the file. The "cursor" is located after what you wrote.
Try f.seek(0) to go at the beginning of your file after writing to it.
answered Nov 11 at 18:57
Matthieu Brucher
10.5k21935
answered Nov 11 at 18:57
Matthieu Brucher
10.5k21935
answered Nov 11 at 18:57
Matthieu Brucher
10.5k21935
answered Nov 11 at 18:57
Matthieu Brucher
10.5k21935
10.5k21935
add a comment |
add a comment |
up vote
0
down vote
Your code is trying to write it as you have ”w+” as a second param of open() call. Please use the open without the second parameter.
answered Nov 11 at 18:58
Ville Laitila
734513
add a comment |
up vote
0
down vote
Your code is trying to write it as you have ”w+” as a second param of open() call. Please use the open without the second parameter.
answered Nov 11 at 18:58
Ville Laitila
734513
add a comment |
up vote
0
down vote
up vote
0
down vote
Your code is trying to write it as you have ”w+” as a second param of open() call. Please use the open without the second parameter.
answered Nov 11 at 18:58
Ville Laitila
734513
Your code is trying to write it as you have ”w+” as a second param of open() call. Please use the open without the second parameter.
answered Nov 11 at 18:58
Ville Laitila
734513
answered Nov 11 at 18:58
Ville Laitila
734513
answered Nov 11 at 18:58
Ville Laitila
734513
answered Nov 11 at 18:58
Ville Laitila
734513
734513
add a comment |
add a comment |
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Files don't work the way you seem to think—their contents can't be randomly written and read the way you're trying to do it. See Reading and Writing Files in the documentation for more information.
– martineau
Nov 11 at 19:21