improve base config reading command line arg logic

cmd_arg/__init__.py

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+from .arg import *

cmd_arg/arg.py

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+import argparse
+import config
+
+async def parse_cmd():
+    # 读取command arg
+    parser = argparse.ArgumentParser(description='Media crawler program.')
+    parser.add_argument('--platform', type=str, help='Media platform select (xhs | dy | ks | bili | wb)',
+                        choices=["xhs", "dy", "ks", "bili", "wb"])
+    parser.add_argument('--lt', type=str, help='Login type (qrcode | phone | cookie)',
+                        choices=["qrcode", "phone", "cookie"])
+    parser.add_argument('--type', type=str, help='crawler type (search | detail | creator)',
+                        choices=["search", "detail", "creator"])
+    parser.add_argument('--start', type=int,
+                        help='number of start page')
+    parser.add_argument('--keywords', type=str,
+                        help='please input keywords')
+
+    args = parser.parse_args()
+
+    # override config
+    config.PLATFORM = args.platform
+    config.LOGIN_TYPE = args.lt
+    config.CRAWLER_TYPE = args.type
+    config.START_PAGE = args.start
+    config.KEYWORDS = args.keywords