A.'in' in 'Thames'

B.'in not' in 'not'

C.'in' in 'in'

D.'t' . upper ( ) in 'Thames'

A.lambda X : None

B.lambda x : def fun(x): return x

C.lambda : 3,1415

D.lambda lambda: lambda * lambda

A.if open ( )'s second argument is 'w' and the invocation succeeds, the previous file's content is lost

B.the second open ( ) argument describes the open mode and defaults to 'w'

C.if open ( ) 's second argument is 'r' the file must exist or open will fail

D.closing an open file is performed by the closefile ( ) function

A.import module_a

B.import pypack.module_a

C.from pypack import module_a

D.import module_a from pypack

A.an instance variable

B.an object variable

C.a class variable

D.there are no such variables, all variables are shared among objects