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"""Verify that warnings are issued for global statements following use"""
from test_support import check_syntax
import warnings
warnings.filterwarnings("error", category=SyntaxWarning, module=__name__)
def compile_and_catch_warning(text):
try:
compile(text, "<test code>", "exec")
except SyntaxWarning, msg:
print "got SyntaxWarning as expected"
else:
print "expected SyntaxWarning"
prog_text_1 = """
def wrong1():
a = 1
b = 2
global a
global b
"""
compile_and_catch_warning(prog_text_1)
prog_text_2 = """
def wrong2():
print x
global x
"""
compile_and_catch_warning(prog_text_2)
prog_text_3 = """
def wrong3():
print x
x = 2
global x
"""
compile_and_catch_warning(prog_text_3)
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