I want to start by pointing out [SO]: C function called from Python via ctypes returns incorrect value (@CristiFati's answer) which describes a problem that most CTypes users run into.
The CTypes home page (also listed in the above URL): [Python.Docs]: ctypes - A foreign function library for Python
I changed your code "a bit".
code.py:
#!/usr/bin/env python
import sys
from ctypes import POINTER, WinDLL, Structure, sizeof, byref
from ctypes.wintypes import BOOL, SHORT, WCHAR, UINT, ULONG, DWORD, HANDLE
LF_FACESIZE = 32
STD_OUTPUT_HANDLE = -11
class COORD(Structure):
_fields_ = [
("X", SHORT),
("Y", SHORT),
]
class CONSOLE_FONT_INFOEX(Structure):
_fields_ = [
("cbSize", ULONG),
("nFont", DWORD),
("dwFontSize", COORD),
("FontFamily", UINT),
("FontWeight", UINT),
("FaceName", WCHAR * LF_FACESIZE)
]
kernel32_dll = WinDLL("kernel32.dll")
get_last_error_func = kernel32_dll.GetLastError
get_last_error_func.argtypes = []
get_last_error_func.restype = DWORD
get_std_handle_func = kernel32_dll.GetStdHandle
get_std_handle_func.argtypes = [DWORD]
get_std_handle_func.restype = HANDLE
get_current_console_font_ex_func = kernel32_dll.GetCurrentConsoleFontEx
get_current_console_font_ex_func.argtypes = [HANDLE, BOOL, POINTER(CONSOLE_FONT_INFOEX)]
get_current_console_font_ex_func.restype = BOOL
set_current_console_font_ex_func = kernel32_dll.SetCurrentConsoleFontEx
set_current_console_font_ex_func.argtypes = [HANDLE, BOOL, POINTER(CONSOLE_FONT_INFOEX)]
set_current_console_font_ex_func.restype = BOOL
def main():
# Get stdout handle
stdout = get_std_handle_func(STD_OUTPUT_HANDLE)
if not stdout:
print("{:s} error: {:d}".format(get_std_handle_func.__name__, get_last_error_func()))
return
# Get current font characteristics
font = CONSOLE_FONT_INFOEX()
font.cbSize = sizeof(CONSOLE_FONT_INFOEX)
res = get_current_console_font_ex_func(stdout, False, byref(font))
if not res:
print("{:s} error: {:d}".format(get_current_console_font_ex_func.__name__, get_last_error_func()))
return
# Display font information
print("Console information for {:}".format(font))
for field_name, _ in font._fields_:
field_data = getattr(font, field_name)
if field_name == "dwFontSize":
print(" {:s}: {{X: {:d}, Y: {:d}}}".format(field_name, field_data.X, field_data.Y))
else:
print(" {:s}: {:}".format(field_name, field_data))
while 1:
try:
height = int(input("\nEnter font height (invalid to exit): "))
except:
break
# Alter font height
font.dwFontSize.X = 10 # Changing X has no effect (at least on my machine)
font.dwFontSize.Y = height
# Apply changes
res = set_current_console_font_ex_func(stdout, False, byref(font))
if not res:
print("{:s} error: {:d}".format(set_current_console_font_ex_func.__name__, get_last_error_func()))
return
print("OMG! The window changed :)")
# Get current font characteristics again and display font size
res = get_current_console_font_ex_func(stdout, False, byref(font))
if not res:
print("{:s} error: {:d}".format(get_current_console_font_ex_func.__name__, get_last_error_func()))
return
print("\nNew sizes X: {:d}, Y: {:d}".format(font.dwFontSize.X, font.dwFontSize.Y))
if __name__ == "__main__":
print("Python {:s} on {:s}\n".format(sys.version, sys.platform))
main()
Notes:
CTypes allows low level access similar to C (only the syntax is Python)
Code uses [MS.Docs]: SetConsoleTextAttribute function
The ctypes.wintypes constants (which reference the standard CTypes types) are used (to give the code a Win like flavor)
It is very (almost painfully) long (also because I've added proper error handling)
An alternative, as suggested in one of the answers of [SO]: Change console font in Windows (where you copied the code from), would be to install a 3rd-party module (e.g. [GitHub]: mhammond/pywin32 - Python for Windows (pywin32) Extensions which is a Python wrapper over WINAPIs) which would require less code to write because the bridging between Python and C would be already implemented, and probably the above functionality could be accomplished in just a few lines
As I commented in the code, setting COORD.X seems to be ignored. But it's automatically set when setting COORD.Y (to a value close to COORD.Y // 2 - probably to preserve the aspect ratio). On my machine (Win 10 pc064) the default value is 16. You might want to set it back at the end, to avoid leaving the console in a "challenged" state (apparently, Win adjusts cmd window size, to be (sort of) in sync with the font size):
![Img0]()
