Issue #16261: Converted some bare except statements to except statements

with specified exception type.  Original patch by Ramchandra Apte.

Author: serhiy-storchaka

Lib/functools.py

@@ -23,7 +23,7 @@
 from weakref import WeakKeyDictionary
 try:
     from _thread import RLock
-except:
+except ImportError:
     class RLock:
         'Dummy reentrant lock for builds without threads'
         def __enter__(self): pass

Lib/ipaddress.py

@@ -135,7 +135,7 @@ def v4_int_to_packed(address):
     """
     try:
         return address.to_bytes(4, 'big')
-    except:
+    except OverflowError:
         raise ValueError("Address negative or too large for IPv4")
 
 
@@ -151,7 +151,7 @@ def v6_int_to_packed(address):
     """
     try:
         return address.to_bytes(16, 'big')
-    except:
+    except OverflowError:
         raise ValueError("Address negative or too large for IPv6")
 
 

Lib/uuid.py

@@ -465,7 +465,7 @@ def _netbios_getnode():
     for libname in ['uuid', 'c']:
         try:
             lib = ctypes.CDLL(ctypes.util.find_library(libname))
-        except:
+        except Exception:
             continue
         if hasattr(lib, 'uuid_generate_random'):
             _uuid_generate_random = lib.uuid_generate_random
@@ -607,7 +607,7 @@ def uuid4():
     try:
         import os
         return UUID(bytes=os.urandom(16), version=4)
-    except:
+    except Exception:
         import random
         return UUID(int=random.getrandbits(128), version=4)
 

Mac/BuildScript/build-installer.py

@@ -572,7 +572,7 @@ def getTclTkVersion(configfile, versionline):
     """
     try:
         f = open(configfile, "r")
-    except:
+    except OSError:
         fatal("Framework configuration file not found: %s" % configfile)
 
     for l in f:
@@ -814,7 +814,7 @@ def downloadURL(url, fname):
     except:
         try:
             os.unlink(fname)
-        except:
+        except OSError:
             pass
 
 def verifyThirdPartyFile(url, checksum, fname):

Tools/demo/ss1.py

@@ -261,21 +261,21 @@ def start_value(self, attrs):
     def end_int(self, text):
         try:
             self.value = int(text)
-        except:
+        except (TypeError, ValueError):
             self.value = None
 
     end_long = end_int
 
     def end_double(self, text):
         try:
             self.value = float(text)
-        except:
+        except (TypeError, ValueError):
             self.value = None
 
     def end_complex(self, text):
         try:
             self.value = complex(text)
-        except:
+        except (TypeError, ValueError):
             self.value = None
 
     def end_string(self, text):
@@ -763,7 +763,7 @@ def change_cell(self):
             for cls in int, float, complex:
                 try:
                     value = cls(text)
-                except:
+                except (TypeError, ValueError):
                     continue
                 else:
                     cell = NumericCell(value)

Tools/scripts/eptags.py

@@ -25,7 +25,7 @@ def treat_file(filename, outfp):
     """Append tags found in file named 'filename' to the open file 'outfp'"""
     try:
         fp = open(filename, 'r')
-    except:
+    except OSError:
         sys.stderr.write('Cannot open %s\n'%filename)
         return
     charno = 0

Tools/unicode/gencodec.py

@@ -127,7 +127,7 @@ def hexrepr(t, precision=4):
         return 'None'
     try:
         len(t)
-    except:
+    except TypeError:
         return '0x%0*X' % (precision, t)
     try:
         return '(' + ', '.join(['0x%0*X' % (precision, item)