List Conditional Summation Methods in Python

list_data=[
	[1.0, 'Accessories', '522422', 'Buttons for Aluminum Button Board', 'Golden', '', 72.0, 'PC', ''], 
	[2.0, 'Accessories', '500031', 'Cross recessed countersunk head self-drilling and tapping screws4.2*45', 'primary color', '', 72.0, 'PC', ''], 
	[1.0, 'Accessories', '522422', 'Buttons for Aluminum Button Board', 'primary color', '', 24.0, 'PC', ''], 
	[2.0, 'Accessories', '500031', 'steel nail', 'primary color', '', 24.0, 'PC', ''], 
	[1.0, 'Accessories', '522422', 'Buttons for Aluminum Button Board', 'primary color', '', 50.0, 'PC', ''], 
	[2.0, 'Accessories', '500031', 'Cross recessed countersunk head self-drilling and tapping screws4.2*45', 'primary color', '', 50.0, 'PC', '']
]
tiaojian=[1,2,3,4,5,7]
QHX=6
def tj_sum(list_data,tiaojian,QHX):# (lists, summation condition columns, summation terms)
	zidian={}
	for i in range(0,len(list_data)):
		jian=''
		for p in range(0,len(tiaojian)):
			jian=jian+str(list_data[i][tiaojian[p]])+','
		if jian in zidian:
			zidian[jian][QHX]=float(zidian[jian][QHX])+list_data[i][QHX]
		else:
			zidian[jian]=list_data[i]
	return list(())
jieguo=tj_sum(list_data,tiaojian,QHX)# Input parameters (lists, summation condition columns, summation terms) are numbered from 0.
print(jieguo)

numbeer = []# Define empty lists with [] instead of {}
def summ(numbeer):
    c = 0
    for x in range(0, numbeer.__len__()):#range needs to be followed by a specific number
        a = numbeer[x]
        c += a
        x += 1
    return c
a = x = 0
while True:
    a = int(input('Please enter a parameter that requires a summation: '))
    (a)The difference between #append and direct subscript assignment: append can still assign values even to an empty list, but subscript assignment does not apply to empty lists.
    x += 1
    c = input('To continue press the space bar or exit')
    if c != ' ':
        break
c = summ(numbeer)# Use a function with a return value that must be given a variable to store the return value
print(c)