find indexes of all "$" elements in the list

data = ['10,537.4', '$', '1,086.0', '$', '291.1', '$', '465.3', '$', '12,379.8']

result = []
pos = 0

while True:
    try:
        pos = data.index('$', pos)
    except ValueError:
        break

    result.append(pos)
    pos += 1 # start one place after previous element

print(result)

#----------------------------------------------------------------------

data = ['10,537.4', '$', '1,086.0', '$', '291.1', '$', '465.3', '$', '12,379.8']

result = []

for pos, value in enumerate(data):
    if value == '$':
        result.append(pos)

print(result)

#----------------------------------------------------------------------

data = ['10,537.4', '$', '1,086.0', '$', '291.1', '$', '465.3', '$', '12,379.8']

result = [pos for pos, value in enumerate(data) if value == '$']

print(result)

#----------------------------------------------------------------------

import numpy as np

data = ['10,537.4', '$', '1,086.0', '$', '291.1', '$', '465.3', '$', '12,379.8']

arr = np.array(data)
result = np.where(arr == '$')[0]
result = result.tolist()

print(result)

#----------------------------------------------------------------------

import pandas as pd

data = ['10,537.4', '$', '1,086.0', '$', '291.1', '$', '465.3', '$', '12,379.8']

df = pd.DataFrame(data)
result = df[ df[0] == '$' ].index
result = result.tolist()

print(result)