Analysis of Pyconfig

pyconfig-analysis.md

PyConfig API

most relevant:

• PyConfig (struct)
• Py_InitializeFromConfig()
• PyInterpreterState.config
• _PyInterpreterState_GetConfig()
• _Py_GetMainConfig()

PyConfig Fields

legend:

X - read + - written

field	type	main	init fini	after	env var	CLI
isolated	int
use_environment	int
dev_mode	int
install_signal_handlers	int
use_hash_seed	int
hash_seed	unsigned long
faulthandler	int
tracemalloc	int
perf_profiling	int
import_time	int
code_debug_ranges	int
show_ref_count	int
dump_refs	int
dump_refs_file	wchar_t *
malloc_stats	int
filesystem_encoding	wchar_t *
filesystem_errors	wchar_t *
pycache_prefix	wchar_t *
parse_argv	int
orig_argv	PyWideStringList
argv	PyWideStringList
xoptions	PyWideStringList
warnoptions	PyWideStringList
site_import	int
bytes_warning	int
warn_default_encoding	int
inspect	int
interactive	int
optimization_level	int
parser_debug	int
write_bytecode	int
verbose	int
quiet	int
user_site_directory	int
configure_c_stdio	int
buffered_stdio	int
stdio_encoding	wchar_t *
stdio_errors	wchar_t *
check_hash_pycs_mode	wchar_t *
use_frozen_modules	int
safe_path	int
int_max_str_digits	int
cpu_count	int
skip_source_first_line	int	X
sys_path_0	wchar_t *	X+

Path configuration inputs:

field	type	main	init	after	env var	CLI
pathconfig_warnings	int
program_name	wchar_t *
pythonpath_env	wchar_t *
home	wchar_t *
platlibdir	wchar_t *

Path configuration outputs:

field	type	main	init	after	env var	CLI
module_search_paths_set	int
module_search_paths	PyWideStringList
stdlib_dir	wchar_t *
executable	wchar_t *
base_executable	wchar_t *
prefix	wchar_t *
base_prefix	wchar_t *
exec_prefix	wchar_t *
base_exec_prefix	wchar_t *

Only used by Py_Main():

field	type	main	init	after	env var	CLI
run_command	wchar_t *	X
run_module	wchar_t *	X
run_filename	wchar_t *	X

#ifdef Py_DEBUG:

field	type	main	init	after	env var	CLI
run_presite	wchar_t *

#ifdef MS_WINDOWS:

field	type	main	init	after	env var	CLI
legacy_windows_stdio	int