practice.txt

Python 3.9.13 (main, Aug 25 2022, 23:51:50) [MSC v.1916 64 bit (AMD64)] on win32
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>>> def f(a=1,b):
	
SyntaxError: non-default argument follows default argument
>>> def f(a=1,b=1):
	print(1)

	
>>> f()
1
>>> def f(a=1,b=1, c):
	print(1)
	
SyntaxError: non-default argument follows default argument
>>> dict1 = {"a":1, "b":2, "c":3}
>>> print(len(dict1))
3
>>> print(dict1.get("b"))
2
>>> dict["a"] =5
Traceback (most recent call last):
  File "<pyshell#9>", line 1, in <module>
    dict["a"] =5
TypeError: 'type' object does not support item assignment
>>> dict1["a"] =5
>>> boxes = {}
>>> jars = {}
>>> crates = {}
>>> boxes['cereal'] = 1
>>> boxes['candy'] = 1
>>> jars['honey'] 4
SyntaxError: invalid syntax
>>> jars['honey']= 4
>>> crates['boxes'] = boxes
>>> crates['jars'] = jars
>>> print(len(crates[boxes]))
Traceback (most recent call last):
  File "<pyshell#21>", line 1, in <module>
    print(len(crates[boxes]))
TypeError: unhashable type: 'dict'
>>> dict1 = {"a":10, "b":2, "c":3}
>>> str1=""
>>> for i in dict1:
	str1=str1+str(dict[i])+""
	str2=str1[:1]
print(str2[::-1])
SyntaxError: invalid syntax
>>> for i in dict1:
	str1=str1+str(dict[i])+""
	str2=str1[:1]
    print(str2[::-1])
    
SyntaxError: unindent does not match any outer indentation level
>>> for i in dict1:
	str1=str1+str(dict[i])+""
	str2=str1[:1]
	
    print(str2[::-1])
    
SyntaxError: unindent does not match any outer indentation level
>>> for i in dict1:
	str1=str1+str(dict[i])+""
	str2=str1[:1]

print(str2[::-1])
SyntaxError: invalid syntax
>>> for i in dict1:
	str1=str1+str(dict[i])+""
	str2=str1[:1]

	
>>> print(str2[::-1])
d
>>> str2
'd'
>>> str1
"dict['a']dict['b']dict['c']"
>>> print(str2[::0])
Traceback (most recent call last):
  File "<pyshell#36>", line 1, in <module>
    print(str2[::0])
ValueError: slice step cannot be zero
>>> for i in dict1:
	str1=str1+str(dict[i])+""
	str2=str1[:-1]

	
>>> print(str2[::-1])
'c'[tcid]'b'[tcid]'a'[tcid]'c'[tcid]'b'[tcid]'a'[tcid
>>> l1 = [1,2,3]
>>> l1
[1, 2, 3]
>>> l2 = ['a123','b123','c123']
>>> l2[2][0]
'c'
>>> l1[:]
[1, 2, 3]
>>> l1[0:]
[1, 2, 3]
>>> l1[0:100]
[1, 2, 3]
>>> l1[:100]
[1, 2, 3]
>>> l1[-1:]
[3]
>>> d = lambda p:p*2
>>> t = lambda p:p*3
>>> x = 2
>>> x = d(x)
>>> x = t(X)
Traceback (most recent call last):
  File "<pyshell#53>", line 1, in <module>
    x = t(X)
NameError: name 'X' is not defined
>>> x = t(x)
>>> x = d(x)
>>> print(x)
24
>>> values = [2,3,2,4]
>>> def my_t(num):
	return num**2

>>> for i in map(my_t,values):
	print(i, end='')

	
49416
>>> l2
['a123', 'b123', 'c123']
>>> ls[-1][-1]
Traceback (most recent call last):
  File "<pyshell#65>", line 1, in <module>
    ls[-1][-1]
NameError: name 'ls' is not defined
>>> l2[-1][-1]
'3'
>>> l2 = ['a123a', 'b123b', 'c123c']
>>> l2[-1][-1]
'c'
>>> def power(x,y=2):
	r = 1
	for i in range(y):
		r=r*x
	return r

>>> print(power(3))
9
>>> print(power(3,3))
27
>>> dic = {"l":"w",
       "t":"w",
       "c":"d",
       "d":"d"}
>>> del dic["t"]
>>> dic
{'l': 'w', 'c': 'd', 'd': 'd'}
>>> name = "snow storm"
>>> print(name[6:8])
to
>>> def main():
	dic["y"] = "t"

	
>>> print(main())
None
>>> def main():
	dic["y"] = "t"
	len(dic)

	
>>> print(main())
None
>>> def main():
	dic["y"] = "t"
	return len(dic)

>>> print(main())
4
>>> names = ["r", "r","r", "i","n"]
>>> print("".join(names))
rrrin
>>> True=False
SyntaxError: cannot assign to True
>>> True=False
SyntaxError: cannot assign to True
>>> 2*3**2
18
>>> a=[1,2,3,4]
>>> b=[sum(a[0:x+1] for x in range(0,len(a))]
   
SyntaxError: closing parenthesis ']' does not match opening parenthesis '('
>>> b=[sum(a[0:x+1]) for x in range(0,len(a))]
>>> print(b)
[1, 3, 6, 10]
>>> names1=['k','r','v','k']
>>> loc=names1.index('e')
Traceback (most recent call last):
  File "<pyshell#106>", line 1, in <module>
    loc=names1.index('e')
ValueError: 'e' is not in list
>>> print(loc)
Traceback (most recent call last):
  File "<pyshell#107>", line 1, in <module>
    print(loc)
NameError: name 'loc' is not defined
>>> boxes ={}
>>> jars ={
	}
>>> crates = {}
>>> boxes['cereal'] =1
>>> boxes['candy']=2
>>> jars['honey']=3
>>> crates['boxes']=boxes
>>> crates['jars']=jars
>>> print(len(crates[boxes]))
Traceback (most recent call last):
  File "<pyshell#117>", line 1, in <module>
    print(len(crates[boxes]))
TypeError: unhashable type: 'dict'
>>> for i in dict1:
	str1=str1+str(dict1[i])+""
	str2=str1[:-1]

	
>>> print(str2[::-1])
201]'c'[tcid]'b'[tcid]'a'[tcid]'c'[tcid]'b'[tcid]'a'[tcid
>>>