1、測試數據
root@PC1:/home/test# ls test.txt root@PC1:/home/test# cat test.txt ## 測試數據 w r s f a s d g z c w d a d g t z c e w
2、提取包含w的行
root@PC1:/home/test# ls test.py test.txt root@PC1:/home/test# cat test.txt ## 測試數據 w r s f a s d g z c w d a d g t z c e w root@PC1:/home/test# cat test.py ## 腳本 fp = open("test.txt", "r") ## 打開文件 sample = fp.readlines() file = open("result.txt", "w") ## 指定寫入文件 for line in sample: ## 對每行進行遍歷 if "w" in line: ## 利用if條件進行判斷 file.write(line) fp.close() file.close() root@PC1:/home/test# python3 test.py ## 執行命令 root@PC1:/home/test# ls result.txt test.py test.txt root@PC1:/home/test# cat result.txt ## 查看結果 w r s f z c w d z c e w
2、同時提取包含w和t的行：
root@PC1:/home/test# ls test.py test.txt root@PC1:/home/test# cat test.txt w r s f a s d g z c w d a d g t z c e w root@PC1:/home/test# cat test.py fp = open("test.txt", "r") sample = fp.readlines() file = open("result.txt", "w") for line in sample: if "w" in line or "t" in line: ## 同時提取包含w 或者 包含 t的行 file.write(line) fp.close() file.close() root@PC1:/home/test# python3 test.py root@PC1:/home/test# ls result.txt test.py test.txt root@PC1:/home/test# cat result.txt ## 查看結果 w r s f z c w d a d g t z c e w
3、提取以w開頭的行
root@PC1:/home/test# ls test.py test.txt root@PC1:/home/test# cat test.txt ## 測試數據 w r s f a s d g z c w d a d g t z c e w root@PC1:/home/test# cat test.py ## python腳本 fp = open("test.txt", "r") sample = fp.readlines() file = open("result.txt", "w") for line in sample: if line.startswith("w"): ## 提取以w開頭的行 file.write(line) fp.close() file.close() root@PC1:/home/test# python3 test.py ## 執行腳本 root@PC1:/home/test# ls result.txt test.py test.txt root@PC1:/home/test# cat result.txt ## 查看結果 w r s f
4、同時提取以w開頭 或者 以z開頭的行
root@PC1:/home/test# ls test.py test.txt root@PC1:/home/test# cat test.txt w r s f a s d g z c w d a d g t z c e w root@PC1:/home/test# cat test.py fp = open("test.txt", "r") sample = fp.readlines() file = open("result.txt", "w") for line in sample: if line.startswith("w") or line.startswith("z"): ## 同時提取以w開頭或者以z開頭的行 file.write(line) fp.close() file.close() root@PC1:/home/test# python3 test.py root@PC1:/home/test# ls result.txt test.py test.txt root@PC1:/home/test# cat result.txt ## 查看結果 w r s f z c w d z c e w
5、提取以w結尾的行
root@PC1:/home/test# ls test.py test.txt root@PC1:/home/test# cat test.txt ## 測試數據 w r s f a s d g z c w d a d g t z c e w root@PC1:/home/test# cat test.py fp = open("test.txt", "r") sample = fp.readlines() file = open("result.txt", "w") for line in sample: if line.endswith("w\n"): ## 每行的末尾是換行符，所以提取最后字符為w的行為 w\n file.write(line) fp.close() file.close() root@PC1:/home/test# python3 test.py root@PC1:/home/test# ls result.txt test.py test.txt root@PC1:/home/test# cat result.txt ## 查看結果 z c e w
6、提取以z開頭同時又以g結尾的行
root@PC1:/home/test# ls test.py test.txt root@PC1:/home/test# cat test.txt w r s f z s d g z c w d z d g g z c e w root@PC1:/home/test# cat test.py fp = open("test.txt", "r") sample = fp.readlines() file = open("result.txt", "w") for line in sample: if line.startswith("z") and line.endswith("g\n"): ## 提取以z開頭，同時以g結尾的行 file.write(line) fp.close() file.close() root@PC1:/home/test# python3 test.py root@PC1:/home/test# cat result.txt ## 查看結果 z s d g z d g g