What is the value of x after evaluating the expression \"x = 2/3\"? (true/false)

Question

What is the value of x after evaluating the expression "x = 2/3"? (true/false) All of the items in a Python list must be of the same type. If x = "hello world", write an expression to return the substring "wor". Given the dictionary: y = {"type": "DNA", "sequence": "GCGAACTACGT", "feature": "none"} Write an expression to change the value of "feature" to "regulatory". Write a Python function named "print_string" which takes a single str argument as input and prints the message: "OUT: " For example: In [1] print_string('foo') OUT: foo Write an expression to add the number "3" to a list named "sizes". What is the output of the command: ['one', 'two', 'three'].pop().upper ()

Explanation / Answer

12)

x = 2/3 is zero. intgers in both numerator and denominator results in only integer(quotient of the division).

13) false.

All items in the python lis can be of any type.

example list = [1,'a',"name"]

14) x = "hello world"
sub = x[6:9]

this method is slicling. x[a:b], a is the starting index, b is the ending index of subpart.

15) y["feature"] = "regulatory"

this is similar to that of list indexing.

16)def print_string(str):
   print "OUT:",str
print_string('foo')

# sample output

# OUT: foo

17)sizes = []
sizes.append("3")

# append adds element to list named sizes.

18) output: THREE

pop() method returns and removes the last element in the list i.e. three

upper() method converts the given string to upper case. i.e. THREE

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