They form on the surface and cool more quickly having larger mineral crystals. just learned this aha
Answer:
The solution in Python is as follows:
class myClass:
def doubleUp(self,myList):
myList[:0] = myList[::2] = myList[1::2] = myList[:]
mylist = [1, 3, 2, 7]
list = myClass()
list.doubleUp(mylist)
print(mylist)
Explanation:
To create a method in Python, the first step is to create a Class.
This is done in the following line:
class myClass:
Then this line defines the method
def doubleUp(self,myList):
This line duplicates the elements of the list
myList[:0] = myList[::2] = myList[1::2] = myList[:]
This defines the list
mylist = [1, 3, 2, 7]
This creates an instance of the class
list = myClass()
This passes the list to the doubleUp method
list.doubleUp(mylist)
This prints the duplicated list
print(mylist)
