Python Toolkit

sum.py

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with open("data.txt") as f:

numsum = sum(float(x) for line in f for x in line.split())

print "", numsum

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number of lines in file "data.txt"

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with open("data.txt") as f:

num_lines = sum(1 for line in f) # num_lines = sum(1 for line in open("data.txt"))

print "", num_lines

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