Write list to binary file python
If you have an object xyou can view its JSON string representation with a simple line of code:. Table Of Contents 7. There is another method, str.
Reading and Writing Files 7. This is useful for making tables pretty. Numbers take a bit more effort, since the read method only returns strings, which will have to be passed to a function like intwhich takes a string like '' and returns its numeric value
More information can be found in the String Formatting Operations section. It is also insecure by default: There is another method, str.
The standard module called json can take Python data hierarchies, and convert them to string representations; this process is called serializing. It interprets the left argument much like a sprintf -style format string to be applied to the right argument, and returns the string resulting from this formatting operation. It is good practice to use the with keyword when dealing with file objects.
There are two ways to format your output; the first way is to do all the string handling yourself; using string slicing and concatenation operations you can create any layout you can imagine. Fancier Output Formatting 7. Basic usage of the str.
Be very careful to use binary mode when reading and writing such files. Note trailing comma on previous line The string types have some methods that perform useful operations for padding strings to a given column width; these will be discussed shortly. Reconstructing the data from the string representation is called deserializing. Modules Next topic 8.