Why can't my program output the results?

I want to implement a function calculation process, but when writing, there will be syntax errors for return and print functions
can someone tell me what this is all about?

import numpy as np
def H_D(D, D_0, fi):
    D_tmp1 = D_0/(D*np.cos(fi))
    H_D = 0.5*D*np.cos(fi)*1(/(np.cosh(D_tmp1))-1/(np.cosh(1/np.cos(fi)))
    return H_D
if __name__ == "__main__":
    print(H_D(0.7, 0.5, 0.04166))

the result is that the return side is red. It is not clear why

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Mar.25,2021

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pycharm is good at writing python, and the error prompt is also very friendly

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bf3ceb-31ead.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf3ceb-31ead.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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