5 examples of 'get index of element in array python' in Python

62
def find_index(self, e):
63
    for i in range(self._size):
64
        if self._data[i] == e:
65
            return i
66
    return -1

4
def find(arr, elem):
5
    lo = 0
6
    hi = len(arr) - 1
7
    while lo < hi:
8
        mid = (hi + lo) // 2
9
        first = arr[lo]
10
        middle = arr[mid]
11
        last = arr[hi]
12
        
13
        if first <= middle and elem >= first and elem <= middle:
14
            return binary_search(arr, elem, lo, mid)
15
        elif last >= middle and elem >= middle and elem <= last:
16
            return binary_search(arr, elem, mid+1, hi)
17
        elif elem >= first and elem <= middle:
18
            hi = mid
19
        else:
20
            lo = mid + 1
21
22
    if arr[lo] == elem:
23
        return lo
24
    return None

17
def at_i(array, i=0):
18
    return [a[i] for a in array]

220
def getInd(value, array):
221
    """Return closest index (rounded down) of a value from sorted array."""
222
    ind = np.abs(array-value).argmin() 
223
    return int(ind)

563
def descr_getitem(self, space, w_idx):
564
    "x.__getitem__(y) <==> x[y]"
565
    if not space.isinstance_w(w_idx, space.w_slice):
566
        idx, stop, step = space.decode_index(w_idx, self.len)
567
        assert step == 0
568
        return self.w_getitem(space, idx)
569
    else:
570
        return self.getitem_slice(space, w_idx)