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    • Home
    • > Tutorials
    • > Python

    Python list – append or prepend a value

    on Apr 12, 2016

    Appending or prepending a value to a list in Python.

    Append value

    a = ["v1", "v2", "v3", "v4"]
    print a
    a.append("new val")
    print a
    ['v1', 'v2', 'v3', 'v4']
    ['v1', 'v2', 'v3', 'v4', 'new val']
    
    Env: Python 2.7.16

    Prepend value

    a = ["v1", "v2", "v3", "v4"]
    print a
    a.insert(0, "new val")
    print a
    a = ["new value2"] + a
    print a
    ['v1', 'v2', 'v3', 'v4']
    ['new val', 'v1', 'v2', 'v3', 'v4']
    ['new value2', 'new val', 'v1', 'v2', 'v3', 'v4']
    
    Env: Python 2.7.16

    Suggested posts:

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    5. Python list (array) basics
    6. Python initialize large list with same value
    7. Python list/array – remove an item
    8. Python filter list/iterable examples
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    Posted in Tutorials | Tagged Python, Python array, Python cookbook, Tutorials

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