Fuzzyman wrote:
Does anyone know how to use _winreg to get path information (location
of install) for all versions of Python installed (and also which is the
most recent) ?
This should probably work:
import _winreg
def get_subkey_names(reg_key):
index = 0
L = []
while True:
try:
name = _winreg.EnumKey(reg_key, index)
except EnvironmentError:
break
index += 1
L.append(name)
return L
def function_in_search_of_a_name():
"""
Return a list with info about installed versions of Python.
Each version in the list is represented as a tuple with 3 items:
0 A long integer giving when the key for this version was last
modified as 100's of nanoseconds since Jan 1, 1600.
1 A string with major and minor version number e.g '2.4'.
2 A string of the absolute path to the installation directory.
"""
python_path = r'software\python\pythoncore'
L = []
for reg_hive in (_winreg.HKEY_LOCAL_MACHINE,
_winreg.HKEY_CURRENT_USER):
try:
python_key = _winreg.OpenKey(reg_hive, python_path)
except EnvironmentError:
continue
for version_name in get_subkey_names(python_key):
key = _winreg.OpenKey(python_key, version_name)
modification_date = _winreg.QueryInfoKey(key)[2]
install_path = _winreg.QueryValue(key, 'installpath')
L.append((modification_date, version_name, install_path))
return L
