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Author: zebbern

pythoninstall.py

@@ -0,0 +1,131 @@
+import sys
+import os
+import platform
+import subprocess
+import urllib.request
+from urllib.error import URLError, HTTPError
+import re
+
+# Base HTTP URL for downloads and version listing
+BASE_HTTP = 'https://www.python.org/ftp/python'
+LISTING_URL = BASE_HTTP + '/'
+
+
+def fetch_all_versions():
+    """Fetch all available Python versions by scraping the FTP directory listing."""
+    try:
+        with urllib.request.urlopen(LISTING_URL) as resp:
+            html = resp.read().decode('utf-8', errors='ignore')
+    except (URLError, HTTPError) as e:
+        print(f"Error fetching version listing: {e}")
+        sys.exit(1)
+
+    # Find entries like '3.9.18/'
+    found = re.findall(r'href=["\'](\d+\.\d+\.\d+)/["\']', html)
+    versions = sorted(set(found), key=lambda v: list(map(int, v.split('.'))))
+    return versions
+
+
+def filter_patches(versions, major):
+    """Return all patch versions matching the given major (e.g. '3.9')."""
+    prefix = major + '.'
+    return [v for v in versions if v.startswith(prefix)]
+
+
+def download_file(url, dest):
+    print(f"Downloading {url}...")
+    try:
+        urllib.request.urlretrieve(url, dest)
+    except Exception as e:
+        print(f"Download failed: {e}")
+        sys.exit(1)
+    print(f"Saved to {dest}")
+    return dest
+
+
+def install_on_windows(installer_path):
+    print("Running Windows installer (quiet, all users)...")
+    try:
+        subprocess.run([installer_path, '/quiet', 'InstallAllUsers=1', 'PrependPath=1'], check=True)
+        print("Installation complete.")
+    except subprocess.CalledProcessError as e:
+        print(f"Windows installation failed: {e}")
+        sys.exit(1)
+
+
+def install_on_linux(source_tar):
+    print("Installing from source (Linux)...")
+    work_dir = "/tmp/python_install"
+    os.makedirs(work_dir, exist_ok=True)
+    try:
+        subprocess.run(["tar", "-xf", source_tar, "-C", work_dir], check=True)
+        src_dir = os.path.join(work_dir, os.listdir(work_dir)[0])
+        os.chdir(src_dir)
+        subprocess.run(["./configure", "--enable-optimizations"], check=True)
+        subprocess.run(["make", "-j$(nproc)"], shell=True, check=True)
+        subprocess.run(["sudo", "make", "altinstall"], check=True)
+        print("Linux installation complete.")
+    except subprocess.CalledProcessError as e:
+        print(f"Linux installation failed: {e}")
+        sys.exit(1)
+
+
+def main():
+    majors = ['3.13', '3.12', '3.11', '3.10', '3.9', '3.8', '3.7', '3.6', '3.5']
+    print("Fetching available versions, please wait...")
+    all_versions = fetch_all_versions()
+
+    print("Choose a Python major version to install:")
+    for idx, ver in enumerate(majors, start=1):
+        print(f"{idx}. Python {ver}")
+    choice = input('Enter number: ').strip()
+    if not choice.isdigit() or not (1 <= int(choice) <= len(majors)):
+        print("Invalid selection.")
+        sys.exit(1)
+    major = majors[int(choice) - 1]
+    print(f"You chose Python {major}.")
+
+    patches = filter_patches(all_versions, major)
+    if not patches:
+        print(f"No patch versions found for Python {major}.")
+        sys.exit(1)
+
+    print("1. Install latest patch for this major")
+    print("2. Choose a specific patch version")
+    sub = input('Enter option [1-2]: ').strip()
+    if sub not in ('1', '2'):
+        print("Invalid option.")
+        sys.exit(1)
+
+    if sub == '1':
+        target_version = patches[-1]
+    else:
+        print("Available patches:")
+        for idx, p in enumerate(patches, start=1):
+            print(f"{idx}. {p}")
+        p_choice = input('Select patch #: ').strip()
+        if not p_choice.isdigit() or not (1 <= int(p_choice) <= len(patches)):
+            print("Invalid patch selection.")
+            sys.exit(1)
+        target_version = patches[int(p_choice) - 1]
+
+    print(f"Preparing to install Python {target_version}...")
+    system = platform.system()
+    if system == 'Windows':
+        filename = f"python-{target_version}-amd64.exe"
+        url = f"{BASE_HTTP}/{target_version}/{filename}"
+        dest = os.path.join(os.getcwd(), filename)
+        download_file(url, dest)
+        install_on_windows(dest)
+    elif system == 'Linux':
+        filename = f"Python-{target_version}.tgz"
+        url = f"{BASE_HTTP}/{target_version}/{filename}"
+        dest = os.path.join('/tmp', filename)
+        download_file(url, dest)
+        install_on_linux(dest)
+    else:
+        print(f"Unsupported OS: {system}")
+        sys.exit(1)
+
+if __name__ == '__main__':
+    main()