Month: July 2018

#The list class provides a mutable sequence of elements d empty_list = list() print( ’empty_list ->’ , empty_list) list_str = list(‘hello’) print(‘list_str ->’, list_str) list_tup = list((1, 2, (3, 5, 7))) print(‘list_tup ->’, list_tup) empty_list=[] print(’empty_list ->’, empty_list) list_syn = [3, 4, ‘e’, ‘b’] print(‘list_syn ->’ , list_syn) print(“‘a’ in list_syn ->”, ‘a’ in list_syn) print(“l not in list_syn ->”, 1 not in list_syn) empty_list.append(5) print( ’empty_list ->’ , empty_list) empty_list.append([6, 7]) print(’empty_list ->’, empty_list) last_elem = empty_list.pop() print(‘last...

While working on a real-time project you often need to play around with Strings in your logic, so it’s better to know all the functions and operations you can do with Strings. Python string can be created using Single or Double quotes. Check out this tutorial on the variables for more info. ex: temp_var = “MyString” String Concatenation- Strings can be concatenated using “+” operator same like Scala. [code lang=”python”]first_name = "Mahendra" last_name = "Dhoni" print(first_name + last_name)[/code] Output: Mahendra Dhoni Note – As already discussed in this tutorial, String has to be typecasted when concatenated with other types. ex- print(24 + “tutorials”) Above example throws exception, like TypeError: cannot...

If-else is basic control statement in any Programming language. Python if-else statement checks the expression inside “if” parenthesis and executes only when specified condition is true. Syntax: if(condition): <set of statements to be executed> elif: <set of statements> else: <set of statements> Note:  Else-if needs to be given as elif in Python and Indentation needs to be taken care properly since python works on Indentation. Example: [code lang=”python”] team="csk" if(team == "csk"): print("Captain is MS Dhoni") elif(team == "rcb"): print("Captain is V Kohli") else: print("please give valid team name")[/code] Output: Captain is MS  Dhoni

Python is pure object-oriented, everything variable is an object. Unlike Java, you no need to declare a variable and specify its datatype. It is intelligent enough to infer the datatype automatically. Below is the syntax to declare a variable in Python. Just specify name and use (=) operator to assign a value. [code lang=”python”] a = 6 b = 7 print(a) print(b)[/code] Output: 6 7 To check the datatype of the variable use – type() method. [code lang=”python”]type(a)[/code] Output: class <Int> You can also explicitly define the variable to specific datatype-like int(value),float(value),str(value) [code lang=”python” highlight=”float(5)” light=”false”]float_var = float(5) print(float_var) print(type(float_var))[/code] Outp...