Python tutorial 3 ---- Strings and Console Output

Section 1 Python also has a good data type: String 2. A String is a String written in ''or" ". 3. Set the brian variable to" Always look on the bright side of life.! "[Python] # Set the variable brian on line 3! Brian = "Always look on the bright side of life! "Section 2 1 Exercise 1 set the variable caesar to Graham 2 set the variable praline to john 3 set the variable viking to Teresa [python] # Assign your variables below, each on its own line! Caesar = "Graham" praline = "John" viking = "Teresa" # Put your variables above this line print caesar print praline print viking section 3 1 Python implements escape characters through \ in step 2, 'Help! Help! I'm being repressed! 'In I' m to escape [python] # The string below is broken. Fix it using the escape backslash! 'Help! Help! \ '\ M being repressed! 'Section 4 1 we can use "" to avoid the emergence of escape characters. Exercise 2: set The variable mongoth_letter to The fifth character of MONTY [python] "The string" PYTHON "has six characters, numbered 0 to 5, as shown below: + --- + | P | Y | T | H | O | N | + --- + + 0 1 2 3 4 5 So if you wanted "Y ", you coshould just type "PYTHON" [1] (always start counting from 0 !) "Effecth_letter =" MONTY "[4] print effecth_letter section 5 1 describes the first method of String. len () Evaluate the length of a String 2 exercise: set the value of the parrot variable to "Norweigian Blue", and then print the length of parrot [python] parrot = "Norwegian Blue" print len (parrot) section 6 1 describes the second method of String. lower () converts all uppercase letters into lowercase letters. Exercise 2: converts uppercase letters in parrot to lowercase letters and prints [python] parrot = "Norwegian Blue" print parrot. lower () Section 7 1 describes the third method of String. upper () converts all uppercase letters to lowercase letters 2. exercise: converts lowercase letters in parrot to uppercase letters and prints [python] pa Rrot = "norwegian blue" print parrot. section 8 1 of upper () describes the fourth method of String. str () converts a non-String to a String. For example, str (2) converts 2 to a String "2" 2 ". exercise: set the pi value of a variable to 3.14 and convert pi to the string [python] "" Declare and assign your variable on line 4, then call your method on line 5! "Pi = 3.14 print str (pi) Section 9 1 describes". for example, the four methods of the above four strings all use the point 2 exercise: use ". use The String variables ministry functions len () and upper (), and print out [python] ministry = "The Ministry of Silly Walks" print len (ministry) print ministry. section 10 of upper () 1 describes the role of print 2 exercises: print the output string "Monty Python" [python] "" Tell Python to print "Monty Python" to the console on line 4! "Print" Monty Python "section 11th 1 describes print to print a variable. 2. Exercise: Assign the value of the_machine_goes to the variable." Ping! ", Then print out [python]" "Assign the string" Ping! "To the variable the_machine_goes on line 5, then print it out on line 6! "The_machine_goes =" Ping! "Print the_machine_goes Section 1 describes how to use + to connect two String 2 exercises: use + to connect the three strings "Spam" and "and" eggs "to output [python] # Print the concatenation of" Spam and eggs "on line 3! Print "Spam" + "and" + "eggs" section 13th 1 describes the function of str () to convert a number into a string. 2. Exercise: Use str () the function converts 3.14 to a string and outputs [python] # Turn 3.14 into a string on line 3! Print "The value of pi is und" + str (3.14) Section 1 describes how to format a string by %. The string is % s 2. For example, there are two strings, format % s to output [python] string_1 = "Camelot" string_2 = "place" print "Let's not go to % s. 'Tis a silly % s. "% (string_1, string_2) Section 15th 1 review previous content 2 Exercise 1 set the value of the variable my_string 2 print the length of the variable 3 use upper () function and print the variable value [python] # Write your code below, starting on line 3! My_string = "chenguolin" print len (my_string) print my_string.upper ()