Objective: Replace string content in a file
Method 1:
Iterate through content and perform replace operation line by line
Note:
This saving method can only save as a different file; otherwise, it will throw an error. Therefore, if you want to use the original filename, you need to overwrite the old file with the new one and delete the new file. This method is not recommended.
Method 2:
Use the fileinput package
Note:
1. You must add print(line); otherwise, the source file will become a blank file after replacement. 2. In Python 3, print() should include end=””; otherwise, an extra blank line will be added after each line in the replaced file. This is because print defaults to handling new lines, and end=”” defines the newline character as empty.
Finally, I have compiled a Python learning roadmap and resource code, hoping to help friends who are learning Python break through information barriers and progress together:
A compilation of technical points in all directions of Python, forming a summary of knowledge points in various fields. Its usefulness lies in the fact that you can find corresponding learning resources based on the knowledge points above, ensuring a more comprehensive learning experience.
Essential development tools
After having a certain foundation and independent understanding ability, I will read books by predecessors or take handwritten notes. These materials detail their unique understanding of technical points, allowing me to learn different ideas and broaden my horizons.
Watching learning videos during the zero-based stage is an efficient way to get started. Following the teacher’s thought process from the basics to deeper levels can easily help grasp the introductory knowledge.
Optical theory is far from enough; it is essential to practice coding hands-on. Only through practical case exercises can what has been learned be truly transformed into practical application skills.
Acquisition method:
1. Follow the public account
2. Forward + reply with the keyword “materials” to get it