Python in float and long inside function and string str introduction

1 Float Type2As_integer_ratio#convert decimals to the simplest ratio3 columns such as40.5 converted to 1/2, cannot convert 2/4, because it is the simplest than5 other and long types are the same as int types6 7 no matter which voice is basically a string and set of operations, learning, you can learn the collection and the use of strings, columns such as Python collection, lists, dictionaries, tuples, etc.8 9 operation of the STR string, focusing onTen Type , view types, objects are created by that class One columns such as: A type (name) - dir looks at all the methods in the class and provides which members can use the - columns such as the dir (name) - __contains__            #contains, determines whether a file exists, as in function, contains a return true, does not contain return false - columns such as: -Aa='QQQQQ' +Result-=aa.__contains__(QQ)#equals result= ' QQ ' in name - __eq__                        #equality of strings, equals = = + __getattribute__        #It will be used when reflected. A __getitem__                 at  -Capitalize ()#Capitalize first letter - columns such as: -A=' AAA ' -result=a.capitalize () - Print(AA) inAaa#Results -  toCasefold ()#capitalize the first letter to lowercase, similar to the capitalize above + columns such as: -A=' Aaa ' theresult=a.capitalize () * Print(AA) $Aaa#ResultsPanax Notoginseng   -Center#Center display, default space padding the columns such as +A=' AAA ' AResult=a.center (20,'*')#20 indicates an empty number of digits, * denotes a filled character, default is a space, the Print(Result) +aaa**********#Results

 $  Count # Counts the number of occurrences of a             string, and you can also specify the range that appears,  such as:

 -  Specify the range, the back of a will not go to find, only in 0-10.

 -  Encode            # Conversion code in 3, the parentheses understand the encoding format  as:

 -  EndsWith            # The character is determined by what end, the parentheses fill in the character and range to be judged, do not specify a range default is all, is return true, not return false    Columns such as:

 About Specify range

 expandtabs                # for converting to spaces, the default one expandtabs to 8 spaces, you can specify
\ t  # means tab, a TAB key, tab is commonly used when writing a configuration file, and you can use Expandtabs to convert \ t to spaces when reading with Python

 # Find    # go to a string to find the position of a character, find the location of the index to return it, also support the specified range, if the found character does not exist return-1 columns such as:

 the  The index        # is the same as find, but if the character you are looking for does not exist, you will get a direct error

 the when not present

   format #   string concatenation, same as% and plus sign   " name= "," AA {0} " KK {1} lll {2} ' #   starting from 0   74  result=name.format ("   AA   ", "   GGGG   ", "   VVVV   ") #   The content here should correspond to the previous index number 
    75  print   (Result) 
    

 the You can also replace the variable with the same effect  + columns such as:

 the Join # used to do stitching, the list, the elements inside the tuple together, the default is an empty connection, you can specify the link of the bayi column, such as: There is a connector for the specified

       ljust #   Fu left, as with center center, preceded by the number specified for its total width  g  Rjust #   Word Fu right, ibid.    style= "color: #000000" and columns such as:   

       lower #   Turn the letter into lowercase   *  lstrip #  Remove the left space   "" "" "Maketrans #   do the corresponding table substitution, and then replace it, not often   90  partition #   character split, in parentheses you can specify a delimiter       

 the Replace # substitution, padding in parentheses (original character, new character, number of substitutions), then it will replace all of that word nonalphanumeric with 94 column such as: Replace 2 A for Q

 theSplit#Specify character split string the back with Rsplit and so on with the front function, but from right to left98Splitlines#Split as a behavior, as with the split (' \ n ') function AboutStartsWith#to begin with, to correspond with EndsWith -Strip#Remove a character101Swapcase#case to convert, convert all uppercase to lowercase, or lowercase to uppercase102Title#title, after use, it will turn all the first of the string into uppercase103Upper#. Lowercase to uppercase

Python in float and long inside function and string str introduction