Hướng dẫn dùng read text python
Summary: in this tutorial, you learn various ways to read text files in Python. Show Nội dung chính
TL;DRThe following shows how to read all texts from the
Steps for reading a text file in PythonTo read a text file in Python, you follow these steps:
1) open() functionThe
The If the program and file are in the same folder, you need to specify only the filename of the file. Otherwise, you need to include the path to the file as well as the filename. To specify the path to the
file, you use the forward-slash ( For example, if the file The
For example, to open a file whose name is
The 2) Reading text methodsThe file object provides you with three methods for reading text from a text file:
3) close() methodThe file that you open will remain open until you close it using the It’s important to close the file that is no longer in use for the following reasons:
The following shows how to call the
To close the file
automatically without calling the
In practice, you’ll use the Reading a text file examplesWe’ll use the-zen-of-python.txt file for the demonstration. The following example illustrates how to use the
Output:
The
following example uses the
Output:
The reason you see a blank line after each line from a file is that each line in the text file has a newline character (\n). To remove the blank line, you can use the
The following example shows how to use the
Output:
A more concise way to read a text file line by lineThe
This is a more concise way to read a text file line by line. Read UTF-8 text filesThe code in the previous examples works fine with ASCII text files. However, if you’re dealing with other languages such as Japanese, Chinese, and Korean, the text file is not a simple ASCII text file. And it’s likely a UTF-8 file that uses more than just the standard ASCII text characters. To open a UTF-8 text file, you need to pass the For the demonstration, you’ll use the following The following shows how to
loop through the
Output: Summary
Did you find this tutorial helpful ? To read a text file in Python, you follow these steps: First, open a text file for reading by using the open() function. Second, read text from the text file using the file read() , readline() , or readlines() method of the file object. Third, close the file using the file close() method. To read from a text file Use the ReadAllText method of the My. Computer. FileSystem object to read the contents of a text file into a string, supplying the path. The following example reads the contents of test. Method 1: Read a File Line by Line using readlines() readlines() is used to read all the lines at a single go and then return them as each line a string element in a list. This function can be used for small files, as it reads the whole file content to the memory, then split it into separate lines. Also if you open Python tutorial about reading and writing files you will find that: 'r+' opens the file for both reading and writing. On Windows, 'b' appended to the mode opens the file in binary mode, so there are also modes like 'rb', 'wb', and 'r+b'. |