How to fix 'RuntimeError: input(): lost sys.stdin' error in python 3.7
Question:
I am practicing some codes and seemingly out of nowhere i have got this error when I ran a very usual piece of code. The problem i am solving takes input, calculates something and gives an output.
I was running it on an online IDE (some coding contest site) and since it wasn’t very good(no surprises there!) i decided to run it on the Pycharm Community Edition and then copy paste it over there. Instead of giving me an output, it showed this,
Traceback (most recent call last):
File "D:Softwarelibio.py", line 52, in <module>
File "D:practiceabc.py", line 1, in <module>
RuntimeError: input(): lost sys.stdin
Process finished with exit code -1073740791 (0xC0000409)
the code i tried to run was this,
tc = int(input())
while tc > 0:
c = 0
a = int(input())
while a > 0:
print(a % 2)
if (a % 2 == 0):
a = a // 2
c += a
print(c, "is c")
tc -= 1
this may or may not be helpful, but i don’t know what’s wrong.
Answers:
I moved it to another folder and it is working fine. Other files in the old folder used to work fine, now they don’t. Is this an error relating to OS?
I was searching solution for same problem . I found this question, so I will leave the solution which worked for my problem to help the other people who has the same issue.
Instead of using input() command I’ve used sys.argv[1] with this command I provide input for my program from command line like mpirun -n 4 python -m deneme.py 1000000. In this case 1000000 is my input.
I ran into this problem randomly from inside a cygwin window for the ‘twine’ package. Restarting cygwin and doing exactly the same thing again fixed the problem. No idea what the underlying issue is, and ‘turn it off and on again’ seems like prosaic advice but… try turning it off and on again.
The problem could relate to your code editor / Python window. The QGIS Python console, for example, doesn’t have stdin or stdout, so you would get the
‘RuntimeError: input(): lost sys.stdin’ error if running your code there.
See this post:
https://gis.stackexchange.com/questions/343250/error-when-using-input-pyqgis-runtimeerror-input-lost-sys-stdin-qgis-3
this might sound stupid but try closing your idle not directly from exit button but, like if you using windows close it from task manager and liekwise in other os. and try reopening it, even if it didn’t worked, try restarting your pc, this really sounds basic and stupid but it really works(at least it worked for me, and also worked for a friend to whom i advised this)
I fixed the same error in Visual Studio "Python" by Project > Properties
then unclicking the "Windows Application" checkbox
I was having the same problem but it solved it when I changed the encoding to UTF-8.
when you write input() in your code, use pyinstaller compiler the .py file, without -w args.
here is the example command line:
pyinstaller -F demo.py
that works fo me
I am practicing some codes and seemingly out of nowhere i have got this error when I ran a very usual piece of code. The problem i am solving takes input, calculates something and gives an output.
I was running it on an online IDE (some coding contest site) and since it wasn’t very good(no surprises there!) i decided to run it on the Pycharm Community Edition and then copy paste it over there. Instead of giving me an output, it showed this,
Traceback (most recent call last):
File "D:Softwarelibio.py", line 52, in <module>
File "D:practiceabc.py", line 1, in <module>
RuntimeError: input(): lost sys.stdin
Process finished with exit code -1073740791 (0xC0000409)
the code i tried to run was this,
tc = int(input())
while tc > 0:
c = 0
a = int(input())
while a > 0:
print(a % 2)
if (a % 2 == 0):
a = a // 2
c += a
print(c, "is c")
tc -= 1
this may or may not be helpful, but i don’t know what’s wrong.
I moved it to another folder and it is working fine. Other files in the old folder used to work fine, now they don’t. Is this an error relating to OS?
I was searching solution for same problem . I found this question, so I will leave the solution which worked for my problem to help the other people who has the same issue.
Instead of using input() command I’ve used sys.argv[1] with this command I provide input for my program from command line like mpirun -n 4 python -m deneme.py 1000000. In this case 1000000 is my input.
I ran into this problem randomly from inside a cygwin window for the ‘twine’ package. Restarting cygwin and doing exactly the same thing again fixed the problem. No idea what the underlying issue is, and ‘turn it off and on again’ seems like prosaic advice but… try turning it off and on again.
The problem could relate to your code editor / Python window. The QGIS Python console, for example, doesn’t have stdin or stdout, so you would get the
‘RuntimeError: input(): lost sys.stdin’ error if running your code there.
See this post:
https://gis.stackexchange.com/questions/343250/error-when-using-input-pyqgis-runtimeerror-input-lost-sys-stdin-qgis-3
this might sound stupid but try closing your idle not directly from exit button but, like if you using windows close it from task manager and liekwise in other os. and try reopening it, even if it didn’t worked, try restarting your pc, this really sounds basic and stupid but it really works(at least it worked for me, and also worked for a friend to whom i advised this)
I fixed the same error in Visual Studio "Python" by Project > Properties
then unclicking the "Windows Application" checkbox
I was having the same problem but it solved it when I changed the encoding to UTF-8.
when you write input() in your code, use pyinstaller compiler the .py file, without -w args.
here is the example command line:
pyinstaller -F demo.py
that works fo me