We will get anImportError, If we try to use a relative import to import a file from a different package. That is why, when we use a relative import, the file we are importing from must be in the same package or a subpackage of the current package. 2. Absolute Imports with sys.path...
To read the contents of a file, we have toopen a filein reading mode. Open a file using the built-in function calledopen(). In addition to the file name, we need to pass the file mode specifying thepurpose of opening the file. The following are the different modes for reading the f...
Handling theNo such file or directoryError It's not uncommon to encounter aNo such file or directoryerror when working with files in Python. To handle this error, you can use atryandexceptblock to catch the error and handle it accordingly. The following code demonstrates how to handle aNo s...
open("d:/tmmp/test/readme.txt","r") 路径也叫文件夹,或者目录(path,folder,directory) python程序的“当前文件夹”(当前路径,当前目录) 程序运行时,会有一个“当前文件夹”,open打开文件时,如果文件名不是绝对路径形式,则都是相对于当前文件夹的。 一般情况下,.py文件所在的文件夹,就是程序运行时的当前...
②语义上的用途不同,read_cav()名字说明它是为CSV文件设计的,read_table()更通用,适用于“任意分隔符的表格data”,尤其是.txt格式】 ③从上述example可知,标识各列名称的表头位于CSV文件的第一行,但是一般情况并非如此,往往CSV文件的第一行列表data。如下所示: 1,5,2,3,cat 2,7,8,5,dog 3,3,6,7...
Note that the result of this function is different from the Unix basename program; where basename for ’/foo/bar/’ returns ’bar’, the basename() function returns an empty string (”). os.path.dirname(path) Return the directory name of pathname path. This is the first half of the pai...
``` # Python script to rename multiple files in a directory import os def rename_files(directory_path, old_name, new_name): for filename in os.listdir(directory_path): if old_name in filename: new_filename = filename.replace(old_name, new_name) os.rename(os.path.join(directory_path...
Note that the result of this function is different from the Unix basename program; where basename for ’/foo/bar/’ returns ’bar’, the basename() function returns an empty string (”). os.path.dirname(path) Return the directory name of pathname path. This is the first half of the pai...
py - Combines all the PDFs in the current working directory into # a single PDF. import PyPDF2, os --snip-- # Loop through all the PDF files. for filename in pdfFiles: --snip-- # Loop through all the pages (except the first) and add them. for pageNum in range(1, pdfReader...
>>>raw=urlopen(url, proxies=proxies).read() The variable raw contains a string with 1,176,831 characters. (We can see that it is a string, using type(raw).) This is the raw content of the book, including many details we are not interested in, such as whitespace, line breaks(换行...