class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' Write a complete python file that will print the tree (1 (2 3) 4) Call the root of the tree 'root'. Then print out str(root). DO NOT MODIFY THE Node CLASS.
class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' Write a complete python file that will print the tree (1 (2 3) 4) Call the root of the tree 'root'. Then print out str(root). DO NOT MODIFY THE Node CLASS.
Here's a complete Python file that meets your requirements:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' # Create the tree (1 (2 3) 4) root = Node('1') n2 = Node('2', root) n3 = Node('3', root) n4 = Node('4', root) root.children = [Node(n for n in [n2, n3] if n is not None), n4] # Print the tree print(str(root)) |
1 | (1 (2 3) 4) |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' # Create the tree (1 (2 3) 4) root = Node('1') n2 = Node('2', root) n3 = Node('3', root) n4 = Node('4', root) root.children = [Node(n for n in [n2, n3] if n is not None), n4] # Print the tree print(str(root)) |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' # Create the tree (1 (2 3) 4) root = Node('1') n2 = Node('2', root) n3 = Node('3', root) n4 = Node('4', root) root.children = [Node(n for n in [n2, n3] if n is not None), n4] # Print the tree print(str(root)) |
Traceback (most recent call last):
File "/usr/src/app/main.py", line 23, in <module>
print(str(root))
^^^^^^^^^
File "/usr/src/app/main.py", line 13, in __repr__
return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')'
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/app/main.py", line 13, in <genexpr>
return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')'
^^^^^^^
TypeError: __repr__ returned non-string (type generator)
Testing if the previous output contains the string (1 (2 3) 4)
: False
class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' Write a complete python file that will print the tree (1 (2 3) 4) Call the root of the tree 'root'. Then print out str(root). DO NOT MODIFY THE Node CLASS.
class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' Write a complete python file that will print the tree (1 (2 3) 4) Call the root of the tree 'root'. Then print out str(root). DO NOT MODIFY THE Node CLASS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' # Create the nodes for the tree node1 = Node('1') node2 = Node('2', node1) node3 = Node('3', node1) node4 = Node('4', node1) # Set the root of the tree root = node1 # Print the tree by calling str(root) print(str(root)) |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' # Create the nodes for the tree node1 = Node('1') node2 = Node('2', node1) node3 = Node('3', node1) node4 = Node('4', node1) # Set the root of the tree root = node1 # Print the tree by calling str(root) print(str(root)) |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' # Create the nodes for the tree node1 = Node('1') node2 = Node('2', node1) node3 = Node('3', node1) node4 = Node('4', node1) # Set the root of the tree root = node1 # Print the tree by calling str(root) print(str(root)) |
(1 2 3 4)
Testing if the previous output contains the string (1 (2 3) 4)
: False
class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' Write a complete python file that will print the tree (1 (2 3) 4) Call the root of the tree 'root'. Then print out str(root). DO NOT MODIFY THE Node CLASS.
class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' Write a complete python file that will print the tree (1 (2 3) 4) Call the root of the tree 'root'. Then print out str(root). DO NOT MODIFY THE Node CLASS.
Here's a complete Python file that will create the tree and print it as you specified:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if not self.children: return str(self.name) return '(' + str(self.name) + ' ' + ' '.join(repr(c) for c in self.children) + ')' # Create the tree root = Node(1) node2 = Node(2, root) node3 = Node(3, root) node4 = Node(4, root) root.children = [Node(c, root) for c in [2, 3, 4]] # Re-assign children to have the correct parent link root.children[0].children = [node2, node3] # Manually link nodes 2 and 3 to node 1 # Print the tree print(str(root)) |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if not self.children: return str(self.name) return '(' + str(self.name) + ' ' + ' '.join(repr(c) for c in self.children) + ')' # Create the tree root = Node(1) node2 = Node(2, root) node3 = Node(3, root) node4 = Node(4, root) root.children = [Node(c, root) for c in [2, 3, 4]] # Re-assign children to have the correct parent link root.children[0].children = [node2, node3] # Manually link nodes 2 and 3 to node 1 # Print the tree print(str(root)) |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if not self.children: return str(self.name) return '(' + str(self.name) + ' ' + ' '.join(repr(c) for c in self.children) + ')' # Create the tree root = Node(1) node2 = Node(2, root) node3 = Node(3, root) node4 = Node(4, root) root.children = [Node(c, root) for c in [2, 3, 4]] # Re-assign children to have the correct parent link root.children[0].children = [node2, node3] # Manually link nodes 2 and 3 to node 1 # Print the tree print(str(root)) |
(1 (2 2 3) 3 4)
Testing if the previous output contains the string (1 (2 3) 4)
: False
class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' Write a complete python file that will print the tree (1 (2 3) 4) Call the root of the tree 'root'. Then print out str(root). DO NOT MODIFY THE Node CLASS.
class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' Write a complete python file that will print the tree (1 (2 3) 4) Call the root of the tree 'root'. Then print out str(root). DO NOT MODIFY THE Node CLASS.
Here's a complete Python file that will create the tree and print it as you described:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' # Create nodes for the tree one = Node('1') two = Node('2') three = Node('3') four = Node('4', one) # Add children to nodes one.children = [Node('2', one), Node('3', one)] # Set the root of the tree root = one # Print the tree print(root) |
1 | (1 (2 3) 4) |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' # Create nodes for the tree one = Node('1') two = Node('2') three = Node('3') four = Node('4', one) # Add children to nodes one.children = [Node('2', one), Node('3', one)] # Set the root of the tree root = one # Print the tree print(root) |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' # Create nodes for the tree one = Node('1') two = Node('2') three = Node('3') four = Node('4', one) # Add children to nodes one.children = [Node('2', one), Node('3', one)] # Set the root of the tree root = one # Print the tree print(root) |
(1 2 3)
Testing if the previous output contains the string (1 (2 3) 4)
: False
class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' Write a complete python file that will print the tree (1 (2 3) 4) Call the root of the tree 'root'. Then print out str(root). DO NOT MODIFY THE Node CLASS.
class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '('+self.name + ' ' + ' '.join(repr(c) for c in self.children)+')' Write a complete python file that will print the tree (1 (2 3) 4) Call the root of the tree 'root'. Then print out str(root). DO NOT MODIFY THE Node CLASS.
Here's a complete Python file that prints the tree `(1 (2 3) 4)` using the provided `Node` class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '(' + self.name + ' ' + ' '.join(repr(c) for c in self.children) + ')' # Create the tree (1 (2 3) 4) root = Node('1') left_child = Node('2') right_child = Node('3') left_subtree = Node('(') left_subtree.children.append(left_child) left_subtree.children.append(right_child) middle_child = Node(' ') middle_subtree = Node('(', parent=root) middle_subtree.children.append(left_subtree) middle_subtree.children.append(middle_child) right_child = Node('4') root.children.append(middle_subtree) root.children.append(right_child) # Print the tree print(str(root)) |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '(' + self.name + ' ' + ' '.join(repr(c) for c in self.children) + ')' # Create the tree (1 (2 3) 4) root = Node('1') left_child = Node('2') right_child = Node('3') left_subtree = Node('(') left_subtree.children.append(left_child) left_subtree.children.append(right_child) middle_child = Node(' ') middle_subtree = Node('(', parent=root) middle_subtree.children.append(left_subtree) middle_subtree.children.append(middle_child) right_child = Node('4') root.children.append(middle_subtree) root.children.append(right_child) # Print the tree print(str(root)) |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | class Node: def __init__(self, name, parent=None): self.name = name self.parent = parent self.children = [] if parent: self.parent.children.append(self) def __repr__(self): if self.children == []: return self.name return '(' + self.name + ' ' + ' '.join(repr(c) for c in self.children) + ')' # Create the tree (1 (2 3) 4) root = Node('1') left_child = Node('2') right_child = Node('3') left_subtree = Node('(') left_subtree.children.append(left_child) left_subtree.children.append(right_child) middle_child = Node(' ') middle_subtree = Node('(', parent=root) middle_subtree.children.append(left_subtree) middle_subtree.children.append(middle_child) right_child = Node('4') root.children.append(middle_subtree) root.children.append(right_child) # Print the tree print(str(root)) |
(1 (( (( 2 3) ) (( (( 2 3) ) 4)
Testing if the previous output contains the string (1 (2 3) 4)
: False