Let's say, I have a python script (test.py) and it contains a function that takes a string and printed back, as following
def pri(str):
print str
How could i call the this function (pri) from the command line?
I tried:
$python test.py pri(blablalba)
but i got the following error: missing end of string
You'd call the python program like any command line program:
python test.py blablabla
Then inside of the program you would do this:
import sys
print sys.argv
The argv variable of sys is a list of all of the arguments passed through the command line to the program that is called. So if you wanted to call specific argument numbers you would treat it like a list. If you wanted to have a method print those arguments out you would either need to pass them to the method or have the method use that variable. In your case you would want something like this:
import sys
def pri(str):
print str
for each in sys.argv[1:]:
pri(each)
pri should also be given on the command line, something like locals()[argv[1]](*argv[2:]) should work.
You can call it like this (assuming your function is saved in a file named test.py)
python -c "from test import pri; pri('test')"
This will output the word test
If your file is named something other than test.py, substitute the word test in your import statement
>python -c "from test import pri; pri('test')"
test
You should use sys.argv. argv is a list of all the arguments passed through the command line.
try this:
import sys
def pri(s):
print s
pri(sys.argv[1])
And you can run it doing python test.py blablabla
I would insist that you use the if __name__ == '__main__' construct. It allows your module to still be importable and to be usable from command line.
For your use case, it would be something like
import sys
def pri(s):
# you stuff
# other stuff
if __name__ == '__main__':
# test presence of params and display comprehensive errors if not applicable
# ...
pri(sys.argv[1])
That way python test.py blabla calls pri('blabla') but you can do import test in another python module without pri being automatically called.
import sys
print (sys.argv[1])
You need to use sys.argv[1]
If you save that in a script call pri.py
Use python pri.py hello from the command line and it will output hello
To print multiple words:
import sys
def pri(s):
print s
if __name__=="__main__":
s = " ".join(sys.argv[1:])
pri(s)
