I'm using Python 3.5 and import a text file as follows
with open(fn) as f:
data = f.read()
I then notice that there's a space between the minus sign and the digits of a negative number (e.g. \n\t- 2.51\t). I have tried to close the gap by writing
data.replace('- ','-'), but nothing happens. Oddly enough, this works like a charm in a Python console, but not in code. How can I solve this problem?
Is this a Unicode issue? Is it possible that the - I type on my keyboard is different from the - in the file? If so, how can I tell the two -'s apart?
Thanks in advance for your assistance
Thomas Philips
I made an elementary error, and wrote
data.replace('- ','-'),
when I should have written
data = data.replace('- ','-').
As soon as I did this, the problem solved itself.
Related
just wondering how to convert a set of code into comments, without having to go through each individual line of code and put a # at the beginning. Was thinking that maybe there was a quick way to highlight the code and then convert it into comment, atm i'm just cutting it off the code and then re-pasting it in later on.
Much appreciated :)
P.S. i m using Pycharm as my IDE
In jupyter notebook, we select lines of code and press ctrl and / key simultaneously to convert a set of code into comments. Also same for vice versa.
You can try it in Pycharm.
You can use the (""") symbol before and after the text you want to comment out. It is not exactly a comment and more of a text constant, but either way it is often used for documentation, so you can use it for multiline comments except for some cases when it causes unexpected errors
To avoid such cases you could simply use multiple single line comments by selecting the desired lines and using ctrl+/ to comment them out
I've got a bit of an annoying issue, I'm trying to write a series of json data to a text document, however, python raises a UnicodeEncodeError whenever it encounters these kinds of characters.
As per the big update with python 3, these characters print to the console just fine, its the issue when we go
with open("filename.txt", "a") as file
file.write("I ♥ ice cream")
file.close()
As I'm still a newbie to python, I haven't the slightest clue how to solve this, any ideas?
Found out how to solve this one!
First off I'd like to thank #JJJ, for hinting me down the right track, however my only criticism is that the presented solution wasn't very straight forward, and for someone with no knowledge of the significance of bytes and strings this may present quite the challenge.
Basically the problem was to do with the default method of encoding that my computer uses (the OS being the standard win 10), being cp1252.
When going into python and having the program run a simple bit of code to test this, it more clearly illustrates the issue and thus we can find a more viable solution.
text = "I ♥ IceCream"
text = text.encode("cp1252")
open('People Jobs.txt','a').write(text)
Running this in IDLE, we get this:
UnicodeEncodeError: 'charmap' codec can't encode character '\u2665' in position 2: character maps to <undefined>
Ah! Now we can see our issue! The codec can't encode the character! Knowing this we can encode the string using utf-8 before writing it to the file like so:
text = "I ♥ IceCream"
text = text.encode("utf-8")
open('People Jobs.txt','a').write(text)
Running this, we finally get:
b'I \xe2\x99\xa5 IceCream'
Which can be written to the file no worries. We can turn this back into the original message using the decode method, however for my purposes, we don't need to do that.
Once again, I'd like to extend my thanks to those who commented on my post, your extensive knowledge of the python language is quite the asset and I greatly appreciate it.
Hopefully my negligence to see these simple programming principles will benefit others when they come to laugh at this post
But hey that's why I have the name!
So until next time,
Mr Incompetent
P.S #Pratik K Thank you for the reminder of how to write this one in a more compact manner, I appreciate it :) (been doing C++ for a while so I've forgotten about python)
I tried it out, seems to work just fine. Just a side note, instead of using with ..., you can just as well write this out as: open(filename, 'a' ).write(string). This will open up the file, write/ append to it, and close it, all within one line.
Just to be clear, the syntax for your solution would be:
with open("filename.txt", 'a') as file:
file.write("I ♥ ice cream")
EDIT: I tried the code lines in the link to other questions that were similar, however the programs did not execute correctly
I am a full-on noob trying to complete some free online resources for self improvement and learning. I am using University of Waterloo's 'Python from scratch' and CS circles course I have tried to answer this question and cannot seem to:
Write a program that asks the user for a string and then prints the string in upper case.
I have tried:
print (str(input()).upper)
AS WELL AS
text = input()
print (text.upper)
AND
print(input().upper())
all programs run, but dont have correct output so I dont know what I am missing here. It's likely obvious and I may feel foolish
I would love to learn and move on, thanks for any assistance!
this is 'Python from scratch' 2.11 problem 'g' (7th problem in set)
You were very close, the following works:
input.upper()
so, print(input.upper())
should work for you.
text=input()
print(text.upper())
print(input().upper())
This should have worked for you in Python 3.x
dear fellow developers,
I have tried to teach python console to display ü, but it insists with displaying ü instead. I have tried it with Python 3.5 and Python 3.6. The result is the same. If I run a .py file containing line print("ü") with F5 command, it displays
ü
instead of ü. If I type in the console
print ("ü")
it displays
ü
I know it has been discussed many times, but most of the methods I have come across during the last 5 hours have not helped me or I have not applied them properly. The problem exists also with other non ascii characters. I appreciate your help!
Try adding the following line on the top on your source file : # coding: utf-8
Also, check if your file encoding is correct (Always choose UTF-8).
i met interesting issue when im comparing two strings. Im reading data from file and everything works well. But then co-worker send me input file, which is just CTRL+C and CTRL+V of working file. And then miracle happend! VBA is so confused, that cant compare two simple strings and i fell of chair.
If you take a look at image you can see that comparison passed if condition where are two same strings, but it should not. Im a bit confused how this can happen.
So met someone something like this? Im realy start thinking about something like machine revolution from Terminator. (files are both saved in notepad++ and there are no strange characters or something like that)
Progress update
So i tried hints from guys in comments below. and ended with something like this
If CStr(Trim(rowArray(4))) <> (CStr("N/A")) Then
Contentent of rowArray(4) is still "N/A" string as on picture above and excel still thinks this strings arent same. I also saved file in pspad, netbeans, and normal notepad and issue is still same.
Use the immediate window to test the contents of the variable:
For i = 1 To Len(rowArray(4)): Print Asc(Mid(rowArray(4), i, 1)): Next
This will print the ASCII value of each character in the string - you can use this to determine what the extra character(s) are causing the issue.