class Payment:

def $\_\_$init$\_\_($self$,$ customer$\_$id$,$ name, card$\_$type, card$\_$no$)$:

self.customer$\_$id $=$ customer$\_$id

self.name $=$ name

self.card$\_$type $=$ card$\_$type

self.card$\_$no $=$ card$\_$no

class Customer:

def $\_\_$init$\_\_($self$,$ id$,$ name, address$)$:

self.id $=$ id

self.name $=$ name

self.address $=$ address

self.cart$\_$items $=[]$ # Multi$-$dimensional array to hold product info

def buy$\_$products$($self$)$:

# Implement buying logic here

pass

def view$\_$products$($self$)$:

# Implement product viewing logic here

pass

def add$\_$to$\_$cart$($self$,$ product$)$:

# Implement adding to cart logic here

self.cart$\_$items.append$($product$)$

def delete$\_$from$\_$cart$($self$)$:

# Implement deleting from cart logic here

pass

class Cart:

def $\_\_$init$\_\_($self$,$ id$)$:

self.id $=$ id

self.number$\_$of$\_$products $=0$

self.products$\_$info $=[]$ # Multi$-$dimensional array holding product info

# Other methods and attributes can be added as per requirements

# Creating relationships between classes by associating them with each other.

customer$1=$ Customer$(1,$ "Alice", "Wonderland"$)$

payment$1=$ Payment$(1,$ "Alice", "Credit", $"1234-5678-9101")$

cart$1=$ Cart$(101)$

# Adding products to cart $($as an example$)$

product$\_$info $=["$Product Name", "Product Description", "Price"$]$

customer$1.$add$\_$to$\_$cart$($product$\_$info$)$