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i have a python3.6.0 script which works perfectly well on windows. but when i run it in bash i get syntax error. here is the code: 

import itertools

lines=["Hamlet","William Shakespeare","Edited Barbara B Mowat Paul Werstine","Michael Poston Rebecca Niles","Folger Shakespeare Library","httpwwwfolgerdigitaltextsorgchapter5playHam","Created Jul 31 2015 FDT version 092","Characters Play","line 17 POLONIUS father Ophelia Laertes councillor King Claudiusthis line substituted GHOST"]
LinesMap=dict()
for line in lines:
list=[l for l in line.split(' ')]
d = dict(itertools.zip_longest(*[iter(list)] * 2, fillvalue=None))
LinesMap = {**LinesMap, **d}

print(LinesMap)

this is the error:

[reza@localhost ~]$ python New\ Text\ Document.py 
File "New Text Document.py", line 16
LinesMap = {**LinesMap, **d}
             ^
SyntaxError: invalid syntax
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  • The Python code has indentation errors which will cause syntax errors on every platform. Please edit the question to show the actual, runnable code. (On the desktop version of this site, you can paste your code, select it with the mouse, and type ctrl-K to have it properly formatted as a code block.) Commented Jan 16, 2019 at 17:00
  • 1
    Alternatively, you can just use LinesMap.update(d). Commented Jan 16, 2019 at 17:02
  • But that doesn't help with longest_zip which also does not exist in Python 2. The proper solution is really to upgrade to the currently recommended and supported version of the language, which is Python 3. Commented Jan 16, 2019 at 17:03
  • 1
    @tripleee Agreed, but izip_longest exists. The code will not work with Python 3 then (except for some try-to-import tricks), but it might serve OP's needs. (Also, Python 2 is still supported, although not recommened) Commented Jan 16, 2019 at 17:05
  • Python 2 is nominally supported until 2020, but it is quite clear that many experts and library maintainers have already abandoned it, or are planning to. By the original timetable, Python 2 was going to be end-of-lifed last year already. It's not a good use of your time to try to fight the process to migrate everyone to Python 3. Commented Jan 16, 2019 at 17:09

2 Answers 2

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On many Linux distros, python refers to Python 2, and you need to use python3 to run a Python 3 script.

Depending on your distro, you should be able to yum or apt-get a package with Python 3, which can coexist nicely alongside Python 2, partly thanks to the decision to use different names for the executables.

In more detail, apt-get install -y python3 (probably with sudo or ask your admin) should install Python 3 on Debian-based platforms (Mint, Ubuntu, what have you); and yum install python36 should install Python 3.6 on various RPM-based platforms (Fedora, CentOS, etc, again probably with sudo or something equivalent).

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5 Comments

while trying to run "yum install python36", i get the error: " Loaded plugins: fastestmirror, langpacks File contains no section headers. file: file:///etc/yum.repos.d/CentosBase.repo, line: 1 'entOS-Base.repo\n' "
The error message tells you how to investigate it, there's what appears to amount to a syntax error in the file it points to. This seems entirely related to your CentOS package manager's configuration, and not at all to Python.
yes! but this is the cuase why my python3.6 code does not run. because python3.6 is not installed and i can not install it using yum because of the error in the previous comment! how can i install python3.6 then?
If you really cannot figure it out, this is a separate problem which you can ask about at Unix & Linux. But they will need to see the actual file which the system is complaining about, not just the error message. Also, make sure this isn't a question which has been asked before.
Quick googling gets me stackoverflow.com/questions/26407178/… which is off-topic and should be closed, but hopefully allows you to solve your problem.
1

Try 

python3 New\ Text\ Document.py

Bash is using python 2 to run this.

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3 Comments

python3 is not installed or enabled on my linux. what can i do?
If you want to run a Python 3 script, you need to install it. Else, you need to convert your script to Python 2, which is probably not a good use of anyone's time.
@Reza you can install it or translate the script to python2. simply replacing the incriminating line with LinesMap.update(d) should do the trick if this is the only issue.

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