CODEWITHSUNDEEP
pythonpython-3.xfile-read
Rohan S
Rohan S

Reputation: 65

read() not reading file's contents

Python 3 code:

file = open("amdPricesPrices.txt", "a+")
prices = file.read()
print(prices)

Text file contents:

69.40 69.30 67.61 76.09 78.19 77.67 86.71 84.85

When I execute this code it does not print anything but a blank line.

Upvotes: 0

Views: 288

Answers (3)

Rami Janini
Rami Janini

Reputation: 593

Using a+ is for appending to a file, while using r is for reading a file.

file = open("amdPricesPrices.txt", "r")
prices = file.read()
print(prices)

Upvotes: 1

alani
alani

Reputation: 13049

If you want read-write access (without truncating the file) and with the file positioned at the start of the file, then open with mode 'r+' -- although 'a+' would work if followed by file.seek(0).

Upvotes: 1

ruohola
ruohola

Reputation: 24018

Using the mode "a+" starts reading from (and writing to) from the end of the file.

You need to either file.seek(0) to the start of the while, or use one of the other opening modes: https://stackoverflow.com/a/1466036. If you are just reading from the file, you don't have to specify the mode, it will use the deault of "r".

Upvotes: 1

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