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Reading from a text file into 2D array

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Reading from a text file into 2D array, python

rancor	30 Aug, 2008 - 01:06 PM Post #1
New D.I.C Head Joined: 30 Nov, 2007 Posts: 22 Thanked 2 times My Contributions	I've been trying to read floating point literals into a 2D array and have unusual results. When i read this file: 1 1.5 0 2 3 3.25 3 1.67 the code below prints out the list [[1.0, 1.5, 0.0, 2.0], [3.0, 3.25, 3.0, 1.6699999999999999]] . If anyone has any suggestions as to why the final number is approximated or knows of a better way of reading the file, please let me know. Thanks! CODE def main(): DEFAULT_DIR = <put the directory where you store the text file> arr = [] f = open(DEFAULT_DIR + 'input.txt', 'r') for line in f: arr.append(map(float, line.split())) print arr if __name__ == '__main__': main()
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paddy3118	30 Aug, 2008 - 10:37 PM Post #2
New D.I.C Head Joined: 28 May, 2007 Posts: 4 My Contributions	QUOTE(rancor @ 30 Aug, 2008 - 02:06 PM) I've been trying to read floating point literals into a 2D array and have unusual results. When i read this file: 1 1.5 0 2 3 3.25 3 1.67 the code below prints out the list [[1.0, 1.5, 0.0, 2.0], [3.0, 3.25, 3.0, 1.6699999999999999]] . If anyone has any suggestions as to why the final number is approximated or knows of a better way of reading the file, please let me know. Thanks! Try this: http://www.python.org/doc//tut/node16.html
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