PYTHON

python find index by value

>>> ["foo", "bar", "baz"].index("bar")
1

find an index of an item in a list python

#Example List
list = ['apples', 'bannas', 'grapes']
#Use Known Entites In The List To Find The Index Of An Unknown Object
Index_Number_For_Bannas = list.index('apples')
#Print The Object
print(list[Index_Number_For_Bannas])

find index of elem list python

# Find index position of first occurrence of 'Ok' in the list 
indexPos = listOfElems.index('Ok')
 
print('First index of element "Ok" in the list : ', indexPos)

python find index of an item in an array

x = ['p','y','t','h','o','n']
print(x.index('o'))

get index of all element in list python

indices = [i for i, x in enumerate(my_list) if x == "whatever"]

find index of element in array python

index = np.where(oneD_array == 2)

get specific index in a list

//this is a fairly crude method but worked for me when iterator
//method didn't work. 

template <class T>
T getItemAtIndex(std::list<T> list, int n) {
	int _pos = 0;
	for (T i : list) {
		if (_pos == n) {
			return i;
		}
		_pos++;
	}
}

Finding index of an item list

>>> ["foo", "bar", "baz"].index("bar")
1

Python find index

array = ["foo", "bar", "baz"].index("bar")
1

get index of item in list

list.index(element, start, end)

python get element by index

# To return the index of the first occurence of element x in lst
ind = lst.index(x)

acess the item in list by index

thelist = [2, 11, 8, 9, 4, 1, 3]
items = [2, 4, 5]
elements = [e for i, e in enumerate(thelist) if i in items]
 
print(elements)

acess the item in list by index

thelist = [2, 11, 8, 9, 4, 1, 3]
items = [2, 4, 5]
elements = [e for i, e in enumerate(thelist) if i in items]
 
print(elements)

find index of value in list python

start_dates_indexes = [index for index, value in enumerate(headers[0]) if value == 'Start Date']

# This will return the indexes with a value of 'Start Date' 
# 	from the array

acess the item in list by index

thelist = [2, 11, 8, 9, 4, 1, 3]
items = [2, 4, 5]
elements = [e for i, e in enumerate(thelist) if i in items]
 
print(elements)

acess the item in list by index

thelist = [2, 11, 8, 9, 4, 1, 3]
items = [2, 4, 5]
elements = [e for i, e in enumerate(thelist) if i in items]
 
print(elements)

get element by index in list python

'el' in array

acess the item in list by index

thelist = [2, 11, 8, 9, 4, 1, 3]
items = [2, 4, 5]
elements = [x for x in thelist if thelist.index(x) in items]
 
print(elements)

acess the item in list by index

thelist = [2, 11, 8, 9, 4, 1, 3]
items = [2, 4, 5]
elements = [e for i, e in enumerate(thelist) if i in items]
 
print(elements)

acess the item in list by index

thelist = [2, 11, 8, 9, 4, 1, 3]
items = [2, 4, 5]
elements = [e for i, e in enumerate(thelist) if i in items]
 
print(elements)

acess the item in list by index

thelist = [2, 11, 8, 9, 4, 1, 3]
items = [2, 4, 5]
elements = [e for i, e in enumerate(thelist) if i in items]
 
print(elements)

acess the item in list by index

thelist = [2, 11, 8, 9, 4, 1, 3]
items = [2, 4, 5]
elements = [e for i, e in enumerate(thelist) if i in items]
 
print(elements)