CODEWITHSUNDEEP
python
Jim Wallace
Jim Wallace

Reputation: 1056

How can I determine the type of an argument passed in python

Specifically I want to know which properties are available on myFile in the following code sample:

def upload(self, myFile):
    out = """<html>
    <body>
        myFile length: %s<br />
        myFile filename: %s<br />
        myFile mime-type: %s
    </body>
    </html>"""

    # Although this just counts the file length, it demonstrates
    # how to read large files in chunks instead of all at once.
    # CherryPy reads the uploaded file into a temporary file;
    # myFile.file.read reads from that.
    size = 0
    while True:
        data = myFile.file.read(8192)
        if not data:
            break
        size += len(data)

    return out % (size, myFile.filename, myFile.content_type)
upload.exposed = True

This is taken from the CherryPy file upload example, and it shows a couple of the properties available in the documentation. Namely file, filename, content_type

But how can I determine all the properties, or better what the actual type is so I can open the source and read the properties?

Upvotes: 1

Views: 121

Answers (1)

Bartosz Marcinkowski
Bartosz Marcinkowski

Reputation: 6881

The type can be obtained with type(myFile). You can use inspect module or myFile.__dict__ to see properties.

If you want to see the source code, use type(myFile).__module__ to see where it is defined.

Upvotes: 2

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