fix(pipreqs): Fix regular expressions matching

pipreqs/pipreqs.py

@@ -13,45 +13,58 @@
 import os, re, logging
 from docopt import docopt
 import yarg
+from yarg.exceptions import HTTPError
 
-REGEXP = [re.compile(r'import ([a-zA-Z123456789]+)'),re.compile(r'from (.*?) import (?:.*)')]
+REGEXP = [
+	re.compile(r'^import (.+)$'),
+	re.compile(r'from (.*?) import (?:.*)')
+]
 
 def get_all_imports(start_path):
 	imports = []
 	packages = []
 	for root, dirs, files in os.walk(start_path):
-	    path = root.split('/')
-	    packages.append(os.path.basename(root))       
-	    for file in files:
-	    	if file[-3:] != ".py":
-	    		continue
-	    	for rex in REGEXP:
-	    		with open(root + "/" + file, "r") as f:
-	    			s = rex.match(f.read())
-	    			if s:
-	    				for item in s.groups():
-	    					if "." in item:
-	    						imports.append(item.split(".")[0])
-	    					else:
-	    						imports.append(item)
-	local_packages =  list(set(packages) & set(imports))
-	third_party_packages = list(set(imports) - set(local_packages))
-	with open(os.path.dirname(__file__)+"/stdlib", "r") as f:
+		path = root.split('/')
+		packages.append(os.path.basename(root))       
+		for file in files:
+			if file[-3:] != ".py":
+				continue
+			for rex in REGEXP:
+				with open(os.path.join(root,file), "r") as f:
+					lines = f.readlines()
+					for line in lines:
+						if line[0] == "#":
+							continue
+						if "(" in line:
+							break
+						s = rex.match(line)
+						if not s:
+							continue
+						for item in s.groups():
+							if "," in item:
+								for match in item.split(","):
+									imports.append(match.strip())
+							else:
+								to_append = item if "." not in item else item.split(".")[0]
+								imports.append(to_append.strip())
+	third_party_packages = set(imports) - set(set(packages) & set(imports))
+	with open(os.path.join(os.path.dirname(__file__), "stdlib"), "r") as f:
 		data = [x.strip() for x in f.readlines()]
 		return list(set(third_party_packages) - set(data))
 
 def generate_requirements_file(path, imports):
 	with open(path, "w") as ff:
 		for item in imports:
-			ff.write(item['name'])
-			ff.write("==")
-			ff.write(item['version'])
+			ff.write(item['name'] + "==" + item['version'])
 			ff.write("\n")
 
 def get_imports_info(imports):
 	result = []
 	for item in imports:
-		data = yarg.get(item)
+		try:
+			data = yarg.get(item)
+		except HTTPError:
+			continue
 		if not data or len(data.release_ids) < 1:
 			continue
 		last_release = data.release_ids[-1]