Returns a dictionary whose keys are included words $($as is$),$ and values are lists of uniquesuccessors to those words. The first word of the txt file is always a successor to $".".$ Be careful withpunctuation. You can assume the text in the txt file does not contain any contraction words $($isnt$,$dont, Im$,$ etc$)$ but you cannot make assumptions about the spacing or the presence of non$-$alphanumerical characters. The starter code already contains the code to read the txt file, just makesure the file is in the same directory as your $.$py file. You must write your code after the file hasbeen read to process the contents.# Open the file and read the contents, the with statement ensuresthe file properly closed after the file operation finisheswith open$($file$\_$path$)$ as file:contents $=$ file.read$()$ # reads the entire file, saving data in contents as stringitems.txt:We came to learn,eat some pizza and to have fun.Maybe to learn how to make pizza too!$>>>$ print$($contents$)\text{'}$We came to learn,eat some pizza and to have fun.

Maybe to learn how to makepizza too!'Hints: The str$.$isalnum$()$ method returns True if all characters in a string are alphanumeric. When x $=\text{'}$We$\text{'},$ the type conversion list$($x$)$ produces the list $[\text{'}$W$\text{'},\text{'}$e$\text{'}]$Preconditions and Postconditionsfile$\_$name: str $->$ A string that ends with $.$txtReturns: dict $->$ Keys are all included words and punctuation marks, values allsuccessors of that key