Questions tagged [python-interactive]
158 questions
5
votes
2 answers
How do I retrieve the output of a previous command and save it in a variable inside the Python interactive shell?
Say I ran an expensive operation foo() which returns me a large list, but I forgot to save the output of foo() inside a variable.
Let's assume if I run foo() again, I will get a different output.
But I really need the output from the first time I…
n00shie
- 1,741
- 1
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- 23
4
votes
2 answers
Virtual Environment Activation from Command Prompt Returns "The system cannot find the path specified" but Activates Venv Anyway?
I created a virtual environment in a Windows terminal using the standard:
python -m venv {venv name}
Everything works as far as I can tell, but when I change into the "Scripts" directory and run "activate" (or even ".\activate"), I get the message…
John Sukup
- 303
- 3
- 11
4
votes
3 answers
Python interpreter segfault
I have strange problem, when I run python shell:
$ python3
Python 3.4.2 (default, Oct 8 2014, 10:45:20)
[GCC 4.9.1] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> print('Hello') # Error appears for any command…
Anton Linevych
- 647
- 1
- 7
- 25
4
votes
2 answers
print greeting message when entering python interpreter
How do I print a greeting message when I initialize a python interpreter? For example, if I were to initialize a python interpreter with custom pre-defined variables, how might I advertise those variables to the user?
Walrus the Cat
- 2,314
- 5
- 35
- 64
4
votes
2 answers
Updating pyplot.vlines in interactive plot
I need your help. Please consider the code below, which plots a sinusoid using pylab in IPython. A slider below the axis enables the user to adjust the frequency of the sinusoid interactively.
%pylab
# setup figure
fig, ax =…
MaxPowers
- 5,235
- 2
- 44
- 69
4
votes
1 answer
python interative mode does not work when reading from std in
Given the following python script....
$ cat readStdin.py
#!/usr/bin/python
import sys
var = "".join(sys.stdin.readlines()).rstrip()
print var
... I get the follwing output:
$ echo hello | python -i readStdin.py
hello
>>>
$
... in other…
murungu
- 2,090
- 4
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- 45
3
votes
1 answer
Why does my code work from interactive shell, but not when run from a file?
I am trying to use the pprint module to check out some vars in Python, which I can happily do using the interactive shell and the code below:
import pprint
pp = pprint.PrettyPrinter()
stuff = ['cakes','bread','mead']
pp.pprint(stuff)
However, when…
ben
- 1,583
- 2
- 11
- 12
3
votes
1 answer
Customize "Python Interactive" Window in VS Code
Is there a way to customize (e.g., JSON config) the 'Python Interactive' Window to iPython/Jupyter console that comes with the MS Python extension?
I would like to be able to adjust the size of the variable explorer pane within the window (it can't…
secJ
- 499
- 3
- 12
3
votes
2 answers
Why is the escape character sometimes output in the interactive interpreter of Python?
If I type this in the interactive interpreter of Python:
>>> 'doesn\'t'
"doesn't"
>>> '"Isn\'t," they said.'
'"Isn\'t," they said.'
Why is the escape character (\) printed in the second case? I realize that I can use the print() function to escape…
jalalhugo
- 65
- 5
3
votes
0 answers
How to fix 'StdinNotImplementedError' in python interactive in Visual Studio Code
I'm using Visual Studio Code (1.34.0) and Python extension by microsoft for python coding. I tried using the input() function in the Python Interactive window and got an error 'StdinNotImplementedError'.
Error
StdinNotImplementedError …
Igor Savchenko
- 31
- 2
3
votes
2 answers
In Python, how could I shell out and interact with an external program (say vi or nano) and return to python
My first question on stackoverflow!
I'm trying to figure out how I can start an external program that requires the user to interact with it, say vi, nano, ssh, telnet etc. and return to the Python script when the program exits.
I don't want to use…
jamdoran
- 41
- 3
3
votes
1 answer
Equivalent of Ipython run command in normal python
I'm trying to run a program using spyder instead of ipython notebook because it currently runs faster.
The data is imported and extracted using
run util/file_reader.py C:/file_address
Obviously the run command doesn't work in normal python and I…
aml
- 137
- 9
3
votes
2 answers
designing python api. reliable cleanup vs easy-to-use in interpreter
I'm working on a design of the python-based API. At the moment I've met an issue with two divergent requirements. On the one side I would like to provide reliable way to cleanup API-related resources. Thus as I know the best way to do it is to use…
reddot
- 764
- 7
- 15
3
votes
0 answers
cursor control for "python -i" in cygwin
When using python in cygwin, you need to use "python -i" to get into interactive mode. This mode however removes my ability to use my arrow keys to go through my history.
When I push the Up-Key, the cursor goes up. When I press DELETE, the…
Vjeetje
- 5,314
- 5
- 35
- 57
2
votes
1 answer
Weird behaviors on interactive imshow plot in Python
I'm trying to construct a grid of black squares, and everytime you click on one it turns white. Now for some reason my code does very weird things:
The coordinates I input doesn't correspond to the array coordinates. I tried to change that by…
Chris Ze Third
- 632
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- 18