python指定读取txt某一行 怎么用python读取txt文件里指定行的内容,并导入excel?
怎么用python读取txt文件里指定行的内容,并导入excel?
指定行吗简单
使用readlines()
他会返回一个列表
一行是一个元素
比如
f=open("123.txt", "r")s=f.readlines()#你想显示第几行就这样#比如你想显示第n行print s[n-1]
python按行读取文件,如何去掉换行符
python处理字符串的内置方法:.strip(),括号里可以指定想要去掉的字符也可以去掉换行符,但是效果看起来不明显如果没有去掉换行符的话会分两行输出
python怎么运行py文件?
1、首先在资源管理器里复制一下py文件存放的路径,按下windows键+r,在运行里输入cmd,回车打开命令行:
2、在命令行里,先切换到py文件的路径下面,接着输入“python 文件名.py ”运行python文件:
3、按下回车键,可以看到窗口中py文件开始运行了,注意在命令行运行py文件,要将python安装路径添加到环境变量path中,否则会报错,找不到命令。至此python运行文件的操作就完成了:
python如何确定读取文本中一共有多少行?
写一个文本统计的脚本:计算并打印有关文本文件的统计数据,包括文件里包含多少个字符、行、单词数,以及前10个出现次数最多的单词按顺序排列 import time keep=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"," ","-","""] stop_words=["the","and","i","to","of","a","you","my","that","in","she","he","her","his","it","be","was","had"] def normalize(s): result="" for c in s.lower(): if c in keep: result =c
python怎么提取特定字符所在的行,并写入一个新的文件里面?
# coding=utf-8str1 = """DEFINITION Schistosoma japonicum SJCHGC07869 protein mRNA, partial cds.ACCESSION AY810830VERSION AY810830.1 GI:60600350KEYWORDS HTC.SOURCE Schistosoma japonicum"""str1 = str1.split("n")with open("out.txt", "w") as f: f.write(str1[3] "n") f.write(str1[5] "n")
python指定读取txt某一行 python中[::-1] python 读取文件某几行
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