str.split([sep[, maxsplit]]) Thestr.splitmethod returns a list of the words in the string, separated by the delimiter string. The parameters are: sep − Optional. Character dividing the string into split groups; default is space. maxsplit − Optional. Number of splits to do; default...
read_csv( 'large.csv', chunksize=chunksize, dtype=dtype_map ) # # 然后每个chunk进行一些压缩内存的操作,比如全都转成sparse类型 # string类型比如,学历,可以转化成sparse的category变量,可以省很多内存 sdf = pd.concat( chunk.to_sparse(fill_value=0.0) for chunk in chunks ) #很稀疏有可能可以装的下...
a nice string representation of the object. | If the argument is a string, the return value is the same object. | | Method resolution order: | str | basestring | object | | Methods defined here: | | __add__(...) | x.__add__(y) <==> x+y | | __contains__(...) | x...
The.splitlines()method splits a string at line boundaries, such as the newline characters (\n), carriage returns (\r), and some combinations like\r\n. It returns a list of lines that you can iterate over or manipulate further:
The delimiter according which to split the string. None (the default value) means split according to any whitespace, and discard empty strings from the result. maxsplit Maximum number of splits to do. -1 (the default value) means no limit. ...
split()的一个常见用法是沿着换行符拆分多行字符串。在交互式 Shell 中输入以下内容: >>>spam ='''Dear Alice, How have you been? I am fine. There is a container in the fridge that is labeled "Milk Experiment." Please do not drink it. ...
This is a sample of a Zero Touch Provisioning user script. You can customize it to meet the requirements of your network environment. """ import http.client import string import re import os import sys import xml.etree.ElementTree as etree import stat import logging import traceback import ...
在本章中,你将了解所有这些以及更多。然后,您将完成两个不同的编程项目:一个存储多个文本字符串的简单剪贴板和一个自动完成格式化文本片段的枯燥工作的程序。 使用字符串 让我们看看 Python 允许你在代码中编写、打印和访问字符串的一些方法。 字符串字面值 ...
num_lines=len(lines) 1. 我们使用了列表的len()函数来计算列表的长度,即行数。 完整代码示例 text="This is a sample string.\nIt has multiple lines.\nEach line is separated by a newline character."lines=text.split("\n")num_lines=len(lines)print("The number of lines is:",num_lines) ...
>>> li = ['Learn','string'] >>> '-'.join(li) 'Learn-string' >>> str.split('n') ['Lear', ' stri', 'g'] >>> str.split('n',1) ['Lear', ' string'] >>> str.rsplit('n') ['Lear', ' stri', 'g'] >>> str.rsplit('n',1) ['Learn stri', 'g'] >>> str...