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@thebjorn: perhaps, but the Python 2.1 example you cited were not safe from unclosed file handler in alternate implementations. A Python 2.1 file reading that is safe from unclosed file handler would take at least 5 lines. –
I am trying to read the lines of a text file into a list or array in python. I just need to be able to individually access any item in the list or array after it is created. The text file is formatted as follows: 0,0,200,0,53,1,0,255,...,0. Where the ... is above, there actual text file has hundreds or thousands more items.
somedata.dat. spam.py. Now suppose the file spam.py wants to read the contents of the file somedata.dat. To do it, use the following code: import pkgutil. data = pkgutil.get_data(__package__, 'somedata.dat') The resulting variable data will be a byte string containing the raw contents of the file. The first argument to get_data () is a string ...
path.read_text().splitlines() If you want to keep the newlines, pass keepends=True: path.read_text().splitlines(keepends=True) I want to read the file line by line and append each line to the end of the list. Now this is a bit silly to ask for, given that we've demonstrated the end result easily with several methods.
In Python 3.5 or later, using pathlib you can copy text file contents into a variable and close the file in one line: from pathlib import Path. txt = Path('data.txt').read_text() and then you can use str.replace to remove the newlines: txt = txt.replace('\n', '')
The reason why you always got True has already been given, so I'll just offer another suggestion:. If your file is not too large, you can read it into a string, and just use that (easier and often faster than reading and checking line per line):
As white spaces are there in text file. strip() method defined on strings will solve this problem. Date, Day, Sect, 1, 2, 3 1, Sun, 1-1, 123, 345, 678 2, Mon, 2-2, 234, 585, 282 3, Tue, 2-2, 231, 232, 686 Source code: Here you do not need to worry about closing the file. It will be taken care by Python.
It is also possible to read an encoded text file using the python 3 read method: f = open (file.txt, 'r', encoding='utf-8') text = f.read() f.close() With this variation, there is no need to import any additional libraries
When you want to read a file with a different configuration than the default one, feel free to use either mpu.aws.s3_read(s3path) directly or the copy-pasted code: def s3_read(source, profile_name=None): """ Read a file from an S3 source.
1. You can use tell() method after reaching EOF by calling readlines() method, like this: fp=open('file_name','r') lines=fp.readlines() eof=fp.tell() # here we store the pointer. # indicating the end of the file in eof. fp.seek(0) # we bring the cursor at the begining of the file.