1 """Verify that warnings are issued for global statements following use."""

     2 

     3 from test.test_support import check_syntax

     4 

     5 import warnings

     6 

     7 warnings.filterwarnings("error", module="<test code>")

     8 

     9 def compile_and_check(text, should_fail=1):

    10     try:

    11         compile(text, "<test code>", "exec")

    12     except SyntaxError, msg:

    13         if should_fail:

    14             print "got SyntaxError as expected"

    15         else:

    16             print "raised unexpected SyntaxError:", text

    17     else:

    18         if should_fail:

    19             print "should have raised SyntaxError:", text

    20         else:

    21             print "as expected, no SyntaxError"

    22 

    23 prog_text_1 = """

    24 def wrong1():

    25     a = 1

    26     b = 2

    27     global a

    28     global b

    29 """

    30 compile_and_check(prog_text_1)

    31 

    32 prog_text_2 = """

    33 def wrong2():

    34     print x

    35     global x

    36 """

    37 compile_and_check(prog_text_2)

    38 

    39 prog_text_3 = """

    40 def wrong3():

    41     print x

    42     x = 2

    43     global x

    44 """

    45 compile_and_check(prog_text_3)

    46 

    47 prog_text_4 = """

    48 global x

    49 x = 2

    50 """

    51 compile_and_check(prog_text_4, 0)