python: fix use of undeclared variables in python scripts

docs/apibuild.py:2436:65: F821 undefined name 'first_letter'
                        chunks.append(["chunk%s" % (chunk - 1), first_letter, letter])
                                                                ^
src/hyperv/hyperv_wmi_generator.py:415:57: F821 undefined name 'number'
        report_error("line %d: invalid block header" % (number))
                                                        ^
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

build-aux/syntax-check.mk

@@ -888,7 +888,6 @@ FLAKE8_WHITESPACE = E211,E221,E222,E225,E226,E231,E261
 FLAKE8_BLANK_LINES = E301,E302,E303,E305
 FLAKE8_LINE_LENGTH = E501
 FLAKE8_STATEMENTS = E722,E741
-FLAKE8_ERRORS = F821
 FLAKE8_WARNINGS = W504,W605
 
 FLAKE8_IGNORE = $(FLAKE8_INDENTATION),$\
@@ -896,7 +895,6 @@ FLAKE8_IGNORE = $(FLAKE8_INDENTATION),$\
 		$(FLAKE8_BLANK_LINES),$\
 		$(FLAKE8_LINE_LENGTH),$\
 		$(FLAKE8_STATEMENTS),$\
-		$(FLAKE8_ERRORS),$\
 		$(FLAKE8_WARNINGS) \
 		$(NULL)
 

docs/apibuild.py

@@ -2401,6 +2401,7 @@ class docBuilder:
         count = 0
         chunk = 0
         chunks = []
+        first_letter = None
         for id in typ:
             if len(index[id]) > 30:
                 continue

src/hyperv/hyperv_wmi_generator.py

@@ -407,7 +407,7 @@ def report_error(message):
 
 
 
-def parse_class(block):
+def parse_class(block, number):
     # expected format: class <name>
     header_items = block[0][1].split()
 
@@ -488,7 +488,7 @@ def main():
         if block is not None:
             if line == "end":
                 if block[0][1].startswith("class"):
-                    parse_class(block)
+                    parse_class(block, number)
 
                 block = None
             else: