48 lines
1.0 KiB
Python
48 lines
1.0 KiB
Python
# 文件读取
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# 文件打开
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# import time
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# f = open("d:program/测试.txt", "r", encoding='UTF-8')
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# print(type(f))
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# # 文件读取
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# print(f.read(3))
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# print(f.read()) # 第二次read会接着上次的读取
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# readlines()读取
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# print(f.readlines())
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# print(type(f.readlines()))
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# readline（）读取
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# print(f.readline())
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# for循环读取 文件
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# for line in f:
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# print(line)
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# 文件暂停
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# time.sleep(2333)
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# f.close()
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# #with open 语法操作
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# with open("d:program/测试.txt", "r", encoding='UTF-8') as f:
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# for line in f:
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# print(line)
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#
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# time.sleep(30000)
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#
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# # 文件写入
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# f = open("d:program/测试1.txt", "w", encoding="UTF-8")
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# f.write("hello world")
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# # f.flush()
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# # time.sleep(30000)
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# f.close() # close()内置flush功能
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# 文件备份
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fw = open("D:\program/bill.txt.bak", 'w', encoding="UTF-8")
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f = open("D:\program/12.txt", 'r', encoding="UTF-8")
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for line in f:
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line=line.strip()
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if line.split(",")[4] == "测试":
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continue
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else:
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fw.write(line)
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fw.write("\n")
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f.close()
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fw.close()
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