python Maximizes without using built in functions

Using python to solve the problem, the requirement of solving is that the functions encapsulated in python, such as max, cannot be used

way1:

def findmax(data,n):
 if n==1:
  return data[0]
 else:
  maxi=data[0]
  for i in data[1:]:
   if maxi<i:
    maxi=i
 return maxi

data=[1,2,34,4]
print(findmax(data,len(data)))

code result:

34

way2:

def getMax(arr):
 for i in range(0,len(arr)):
  for j in range(i+1,len(arr)):
   first=int(arr[i])
   second=int(arr[j])
   if first<second:
    arr[i]=arr[j]
    arr[j]=first
 print(arr[0])
arr=[19,29,30,48]
getMax(arr)

code result

48