Converting python string object to c char* using ctypes

Question

I am trying to send 2 strings from Python (3.2) to C using ctypes. This is a small part of my project on my Raspberry Pi. To test if the C function received the strings corr

Answer 1

I think you just need to use c_char_p() instead of create_string_buffer().

string1 = "my string 1"
string2 = "my string 2"

# create byte objects from the strings
b_string1 = string1.encode('utf-8')
b_string2 = string2.encode('utf-8')

# send strings to c function
my_c_function(ctypes.c_char_p(b_string1),
              ctypes.c_char_p(b_string2))

If you need mutable strings then use create_string_buffer() and cast those to c_char_p using ctypes.cast().