logo
down
shadow

Python 3 readline() does not work


Python 3 readline() does not work

By : Abhishek Katyal
Date : November 19 2020, 03:01 PM
fixed the issue. Will look into that further Your question title states readlines(), your question code uses readline(). Two different functions The size/hint parameter you have specified reads up to the number of bytes (not lines in either case -- bytes).
You probably meant something like this
code :
entered_password = datafile.readlines()[1].strip()


Share : facebook icon twitter icon
Python 2.7.4 on Ubuntu 10.04, Import readline error(Tried many ways never work)

Python 2.7.4 on Ubuntu 10.04, Import readline error(Tried many ways never work)


By : CTO
Date : March 29 2020, 07:55 AM
I wish did fix the issue. As in the title, my system version is Ubuntu 10.04. The default version of Python is 2.6.5. When I start python2.6 in command line and , I tried again, installed these packets:
code :
sudo apt-get install build-essential
sudo apt-get install libreadline5-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev
How does readline and readlines work in Python

How does readline and readlines work in Python


By : Jenny
Date : March 29 2020, 07:55 AM
may help you . So I have a text file that contains some text in the following format: , With this file:
code :
$ cat /tmp/test.txt
Largest
19 15 10
12
>>> with open('/tmp/test.txt') as f:
...    data=f.readlines()
... 
>>> data
['Largest\n', '19 15 10\n', '12']
>>> a,b,c=data
>>> a
'Largest\n'
>>> b
'19 15 10\n'
>>> c
'12'
>>> a,b,c=data[0:3]
>>> a=data[0].strip()
>>> b=map(int, data[1].strip().split())
>>> c=int(data[2])
>>> a
'Largest'
>>> b
[19, 15, 10]
>>> c
12
Python's readline() function seeming not to work?

Python's readline() function seeming not to work?


By : anilsatyakumar
Date : March 29 2020, 07:55 AM
will be helpful for those in need Because you opened the file in a+ mode, the file pointer starts at the end of the file. After all, that is where you would normally append text.
If you want to read from the top, you need to place fileA.seek(0) just before you call readline:
code :
fileA.seek(0)
line = fileA.readline()
Python:Why readline() function doesn't work for file looping

Python:Why readline() function doesn't work for file looping


By : Alyx Vance
Date : March 29 2020, 07:55 AM
this one helps. You are messing up the internal state of the file-iteration, because for optimization-reasons, iterating over a file will read it chunk-wise, and perform the split on that. The explicit readline()-call will be confused by this (or confuse the iteration).
To achieve what you want, make the iterator explicit:
code :
 import sys

 with open(sys.argv[1]) as inf:
     fit = iter(inf)
     for line in fit:
         print "current", line
         try:
             print "next", fit.next()
         except StopIteration:
             pass
Python - Readline Control-D after non-empty line does not work why?

Python - Readline Control-D after non-empty line does not work why?


By : Oleg
Date : March 29 2020, 07:55 AM
This might help you I think my answer from here can be copied immediately:
Related Posts Related Posts :
  • Element disappears when I add an {% include %} tag inside my for loop
  • Django Rest Framework with either a slug or a pk lookup field for the DetailAPIView
  • Flask doesn't stream on Lambda
  • Generate all permutations of fixed length where the elements come from two different sets
  • Making function for calculating distance
  • How to handle multiprocessing based on the limit of CPU's
  • Django - static files is not working
  • Remove x axis and y axis black lines with matplotlib
  • tkinter: assigning multiple functions to one button
  • flask-jwt-extended: Fake Authorization Header during testing (pytest)
  • Setting pandas dataframe value based on row and column conditions
  • swig char ** as a pointer to a char *
  • Confusion over `a` and `b` attributes from scipy.stats.uniform
  • How can I do groupy.apply() without sort my index?
  • Querying Google Cloud datastore with ancestor not returning anything
  • Read value from one thread in Python: queue or global variable?
  • Django - context process query being repeated 102 times
  • Convert a list of images and labels to np array to train tensorflow
  • Lambda not supporting NLTK file size
  • Numpy ndarray image pixel mean for pixel values greater than zero: Normalizing image
  • Understanding output of np.corrcoef for two matrices of different sizes
  • Finding longest perfect match between two strings
  • what is wrong with my cosine similarity? Tensorflow
  • How to manage user content in django?
  • Receiving unsupported operand error while comparing random number and user input.
  • How to wrap the process of creating start_urls in scrapy?
  • How to mark 'duplicated sequence' in pandas?
  • Boolean indexing on multidimensionnal array
  • Unmodified column name index in patsy
  • Cleaner way to unpack nested dictionaries
  • Importing a python module to enable a script to be run from command line
  • Maya Python read and set optionMenu value via variable
  • How can I bind a property to another property in Kivy?
  • Python extracting specific line in text file
  • How to implement n-body simulation with pymunk?
  • Python / matplotlib: print to resolution and without white space / borders / margins
  • Sum up the second value from one dictionary with all values from another dictionary
  • Robot Framework: Open a chrome browser without launching URL
  • Generate inline Bokeh scatterplots in Jupyter using a for loop
  • Group list of dictionaries python
  • Efficient way to apply multiple Boolean mask to set values in a column using pandas
  • Lazy evaluation of a Python dictionary
  • id of xpath is getting changed every time in selenium python 2.7 chrome
  • Matplotlib RuntimeWarning displaying a 3D plot
  • Cannot install pyqt5 for python3.4 on windows 10
  • Gravity Problems
  • Where to position `import` modules inside an class?
  • Python OpenCV: Cannot resize image
  • Print on the same spot in IPython console
  • Disable logging except in tests
  • Writing json to file in s3 bucket
  • Sorting numpy array created by laspy
  • Open an XML file through URL and save it
  • How to build a 2-level dictionary?
  • error installing scipy using pip on windows 10
  • __str__ from my own matrix, python
  • python re how to Extract fields use findall()?
  • how to read a value from text HI file using python?
  • How to use horizontal scrolling in treeview,here i use tree view to make a table
  • Dependant widgets in tkinter
  • shadow
    Privacy Policy - Terms - Contact Us © voile276.org