Convert Numpy array of ASCII codes to string

print "".join([chr(item) for item in a])

output

abc

Another solution that does not involve leaving the NumPy world is to view the data as strings:

arr = np.array([97, 98, 99], dtype=np.uint8).view('S3').squeeze()

or if your numpy array is not 8-bit integers:

arr = np.array([97, 98, 99]).astype(np.uint8).view('S3').squeeze()

In these cases however you do have to append the right length to the data type (e.g. 'S3' for 3 character strings).

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