my_dict={'key1':('a','b','c','d'), 'key2':('e','f','c','h'}
global_syntax=""
for key, val in my_dict.iteritems():
    if val[2][0]='c':
        mysyntax(key)

def write_to_file (syntax_to_write):
    global global_syntax
    global_syntax=global_syntax+str(syntax_to_write)

def mysyntax(key):
    my_variable=key
    my_syntax="""
do all stuff + {key} + {val}
""".format(
key=key,
val=val[2][0])
    write_to_file(mysyntax.encode('utf8'))