5 examples of 'python check if value exists in list' in Python

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20def in_list(value, arg):
21 return value in ( arg or [] )
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31def _value_exists(self, value):
32 """
33 Checks if the value exists in the storage
34
35 @param value: value to be checked in storage
36 @type value: string
37
38 @return: result of select SQL query
39 @rtype: tuple
40 """
41 return run_sql("""SELECT seq_value FROM seqSTORE
42 WHERE seq_value=%s AND seq_name=%s""",
43 (value, self.seq_name))
5def _find_dict_in_list(list_of_dict, key, val):
6 """Given a list of dictionaries, return the first dictionary that has the
7 given key:value pair.
8 """
9 try:
10 for d in list_of_dict:
11 if (key, val) in d.items():
12 return d
13 except TypeError:
14 pass
1def contains_val(data, key, value):
2 """
3 check if certain key has certain value, return true if so and false otherwise
4 """
5 # try to get value variable from parser specific variables
6 value = _ttp_["parser_object"].vars.get(value, value)
7 if not value in data.get(key, ""):
8 return data, False
9 return data, None
14def check_if_one_item_has_property_v1(my_list, key):
15 """
16 Return true if at least one item has a
17 property.
18 """
19 list_position = 0
20 while list_position < len(my_list) and my_list[list_position] != key:
21 list_position += 1
22
23 if list_position < len(my_list):
24 # Found an item with the property
25 return True
26 else:
27 # There is no item with the property
28 return False

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