StringIO in Python
Introduction
In some cases, data reading and writing are not necessarily in files, but it needs to be read and written in memory. Python has a built-in module named StringIO. It can produce file-like objects (also known as memory files or string buffer) and be read and written just like files.
Write to A Memory File
As the above example shown, we can use the write() method to write data to a StringIO object. The getvalue() method helps us get the entire content of a StringIO object.
Read a Memory File
Since a StringIO object is a file-like object, we can use the file handling operations to read it.
Close a Memory File
A good habit is closing the StringIO object after using it. The StringIO.close() method will help us free the relative memory space. If we operate a closed memory file, a ValueError will be raised.
Conclusion
StringIO gives us abilities of operating strings in memory, and it has a consistent interface with reading and writing files.
Thanks for reading.
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