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python - Choose a file starting with a given string

In a directory I have a lot of files, named more or less like this:

001_MN_DX_1_M_32
001_MN_SX_1_M_33
012_BC_2_F_23
...
...

In Python, I have to write a code that selects from the directory a file starting with a certain string. For example, if the string is 001_MN_DX, Python selects the first file, and so on.

How can I do it?

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import os
prefixed = [filename for filename in os.listdir('.') if filename.startswith("prefix")]

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