How to remove leading and trailing zeros in a string? Python

I have several alphanumeric strings like these

listOfNum = ["000231512-n","1209123100000-n00000","alphanumeric0000", "000alphanumeric"]

The desired output for removing trailing zeros would be:

listOfNum = ["000231512-n","1209123100000-n","alphanumeric", "000alphanumeric"]

The desired output for leading trailing zeros would be:

listOfNum = ["231512-n","1209123100000-n00000","alphanumeric0000", "alphanumeric"]

The desire output for removing both leading and trailing zeros would be:

listOfNum = ["231512-n","1209123100000-n", "alphanumeric", "alphanumeric"]

For now i"ve been doing it the following way, please suggest a better way if there is:

listOfNum = ["000231512-n","1209123100000-n00000","alphanumeric0000", 
"000alphanumeric"]
trailingremoved = []
leadingremoved = []
bothremoved = []

# Remove trailing
for i in listOfNum:
  while i[-1] == "0":
    i = i[:-1]
  trailingremoved.append(i)

# Remove leading
for i in listOfNum:
  while i[0] == "0":
    i = i[1:]
  leadingremoved.append(i)

# Remove both
for i in listOfNum:
  while i[0] == "0":
    i = i[1:]
  while i[-1] == "0":
    i = i[:-1]
  bothremoved.append(i)