Develop Reference

Script works in shell but not as IDLE file

When the following code is executed line by line on shell, it is giving the expected output :
>>> name=input("Please give your full name : ")
Please give your full name : ins vikranth
>>> ListName=name.split(' ')
>>> outputString=ListName[1]+' '+ListName[0]
>>> print(outputString)
vikranth ins
The code is not running in total as a file but runs line by line on the shell.
The code is :
name=input("Please give your full name : ")
ListName=name.split(' ')
outputString=ListName[1]+' '+ListName[0]
print(outputString)
The error message is :
Please give your full name : ins vikranth
Traceback (most recent call last):
File "ReverseName.py", line 1, in <module>
name=input("Please give your full name
File "<string>", line 1
ins vikranth
^
SyntaxError: unexpected EOF while parsing
Why is this happening?

the reason why this is happening is your python version ... your IDLE is python 3.X while your file is being "translated" ( Interpret ) using python 2.X ... so there are 2 simple solutions:
1/ stick with python 3.X - your code is not going to change, just change Interpreter
2/ edit it to be compatible with python 2.X :
name=raw_input("Please give your full name : ")
also here are 2 online compilers, where you can see the difference:
Python 3.7 -> https://www.onlinegdb.com/online_python_compiler
Python 2.7 -> https://repl.it/languages/python

#Babu brother code seems to okey for me but you might forget somepoint.If person have a middle name it will cause an error. You have 2 array locations when user types more than 2 words it cause an unexpected end of file due to lack of location like Kevin Prince Boateng a footballer. You might want to look this https://docs.python.org/2/c-api/memory.html for a dynamical memory management

LPTHW EX25 - not running normally in powershell

I am following zed shaw's book LPTHW and stuck on ex25. I have typed the code accordingly without errors. If I understand it right he has asked to run it first normal in powershell but when I put the command:
C:/mystuff> python ex25.py ,
It enters to next line without any output.
I tried importing ex25 in python interpreter this is the error i get:
>>import ex25
>>sentence = "All good things come to those who wait."
>>words = ex25.break_words(sentence)
After this I get an error:
Traceback <most recent call last>:
file stdin in line 1 <module>
file ex25.py line 3 in break_words
words = stuff.split(' ')
Value error: empty separator.
what am I doing wrong? Also i experimented for over half hour now trying different solutions , make it work. I guess the powershell wont respond because the program is basically a bunch of functions , without any input. But in the interpreter we do give an input of a sentence , then why the error? Doing my head-in.
the code link for LPTHW: http://learnpythonthehardway.org/book/ex25.html

I don't know your code for ex25 but here is mine for the line it says you have error on
def break_words(stuff):
"""This function will break up words for us."""
words = stuff.split(' ')
return words
It works for me you can make a new file and put that portion of your code and mine then compare them if they are exactly the same with 0 difference then tell me. if you can can you post that part of your code in the question

How to enter multiple input data using an online compiler such as ideone, codepad and compileonline?

I would like to test programs online, as the place where I work does not have a python compiler. There are many online sites such as ideone, codepad and complieonline. However, I have noticed that codepad does not accept input data and although ideone input data, it only accepts one entry data at a time. For example I wanted to test this program on complileonline
PREFIX = 'Simon says '
line = raw_input('Enter: ')
while line:
if line.startswith(PREFIX):
print line[len(PREFIX):]
line = raw_input('Enter: ')
I entered my input and separated them by pipeline (as stated on the website instructions) but kept getting this error message
Executing the code....
$python /tmp/135731949523855.py
Enter: Enter: Enter: Traceback (most recent call last):
File "/tmp/135731949523855.py", line 9, in ?
line = raw_input('Enter: ')
EOFError: EOF when reading a line
How can I enter multiple entries to test my program? How can I enter multiple entries onto these online websites, otherwise is there another, example testing with my code without the requirement of user input.

Well, consider to use hard-coded inputs inside your code (turn the "raw_input" function into something you except to get from the user). It can be great solution.
One of the options you have which is pretty close to raw_input, is to use sys.argv:
import sys
print sys.argv[1]
Compileonline provides you the option, below of your code, to add command line arguments.
However, on PythonAnywhere.com your code seems to run just fine :) You might want to try it there.
Good luck:)

Traceback NameError in python tutorial

I'm reading an online python tutorial book from here. The code is listed below. When I execute the code, I can type words into it but then it gave me the error below. What is the wrong with the code?
On a related note, if you have a better resource for leaning python, please let me know. I'm looking for one that is online and updated often (ex: railstutorial.org). The resource I am using have plenty of errors even this early in the book. Thanks.
Enter something : programmig is fun
Traceback (most recent call last):
File "break.py", line 5, in <module>
s = input('Enter something : ')
File "<string>", line 1, in <module>
NameError: name 'programmig' is not defined
#!/usr/bin/python
# Filename: break.py
while True:
s = input('Enter something : ')
if s == 'quit':
break
print('Length of the string is', len(s))
print('Done')

This is python 3 code. It seems like you're running it with python 2.
Run python --version to check which version of python you are using.

input() doesn't get a string, so it thinks that programmig is a variable. You can type the input you want in quotes to solve this.
A better way however, is to use raw_input, which returns a string.
So either do Enter something : 'programmig is fun', not recommended, or do s = raw_input('Enter something : ') recommended way
The cause of the confusion is that the book is probably for python 3, which has a different input, and also a different print, while you are using python 2.x.

problems with file I/O while running python 3.2 scripts in windows cmd, but not in IDLE

I am a python noob, and am having problems running programs with open() functions in cmd prompts. The code runs as expected in the python shell with IDLE, but everytime I open it by doubleclicking the icon coresponding to the script( I have .py associated with python), I get errors like
what file test.txt (I entered input)
file 2 atest2.txt (I entered intput)
Traceback (most recent call last):
File "C:\Users\Matthew\Desktop\file_io\find_differences_in_files.py", line 3,
in <module>
f=open(c,"r") # open c
IOError: [Errno 22] Invalid argument: 'test.txt\r'
Similar problems occur in multiple similar programs, but here is a sample of code( FYI, this code finds the first difference in two .txt files) that worked in IDLE but not in cmd. Anybody have any clue what is going wrong?
c=input("what file") # get file 1
d=input("file 2") # get file 2
f=open(c,"r") # open c
g=open(d,"r") # open d
p=f.readlines() # get every line of f
q=g.readlines()
i=0
while i<len(p) and i<len(q):
if p[i]!=q[i]:
break # stop counting up
i+=1
x=p[i] # store different line
y=q[i] # store different line
j=0
while j<len(x) or i<len(y):
if x[j]!=y[j]:
break # stop counting up
j+=1
print("The difference is in line %s column %s" % (i+1,j+1))
c=input("press enter")

You're not handling end-of-line characters correctly, and IDLE gives you the end-of-line in one format, while the cmd.exe sends another.
I suggest stripping whitespace from both ends of the input in this case.