摘要:
分别用sed awk perl grep 实现: 1 sed '/^$/d' input.txt > output.txt #output file: output.txt 2 sed -i '/^$/d' input.txt #output file: input.txt 3 awk 'NF > 阅读全文
posted @ 2014-08-02 10:42
emanlee
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摘要:
num_lines = sum(1 for line in open(input_file_name)) 阅读全文
posted @ 2014-08-02 10:34
emanlee
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