Simplify isinstance, key in dict, enumerate

[hugovk]

Use single isinstance call for multiple types

For example, instead of:

isinstance(params, list) or isinstance(params, tuple)

Use:

isinstance(params, (list, tuple))

Docs: "If classinfo is a tuple of type objects (or recursively, other such tuples) or a Union Type of multiple types, return True if object is an instance of any of the types."

https://docs.python.org/3/library/functions.html#isinstance

Use key in mydict

For example, instead of:

key in TiffTags.TAGS_V2_GROUPS.keys()

Use:

key in TiffTags.TAGS_V2_GROUPS

Docs: "For mapping objects, this should consider the keys of the mapping rather than the values or the key-item pairs."

https://docs.python.org/3/reference/datamodel.html#object.__contains__

Use enumerate

For example, instead of:

frame_number = 0
for mpentry in mpinfo[0xB002]:
    ...
    frame_number += 1

Use:

for frame_number, mpentry in enumerate(mpinfo[0xB002]):
    ...

Docs: https://docs.python.org/3/library/functions.html#enumerate