replace() is an inbuilt function in Python programming language that returns a copy of the string where all occurrences of a substring is replaced with another substring.

Syntax: string.replace(old, new, count)

old – old substring you want to replace.

new – new substring which would replace the old substring.

count – the number of times you want to replace the old substring with the new substring. (Optional)

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insert() is an inbuilt function in Python that inserts a given element at a given index in a list.

Syntax: list_name.insert(index, element)

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extend() iterates over its argument and adding each element to the list and extending the list. The length of the list increases by number of elements in it’s argument.

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append() adds its argument as a single element to the end of a list. The length of the list increases by one.

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SimpleDateFormat class has been added to the java.text package in the 7th JDK version. Parse the Time Period in the format HH:MM:SS by creating a SimpleDateFormat object. SimpleDateFormat object parses the Time period and returns a Date object which can be used to calculate the time elapsed.

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Calculating the number of days between two dates in JavaScript required to use date object for any kind of calculation. For that, first, get the internal millisecond value of the date using the in-built JavaScript getTime() function. As soon as both the dates get converted, proceed further by subtracting the later one from the earlier one which in turn returns the difference in milliseconds. Later, the final result can be calculated by dividing the difference (which is in milliseconds) of both the dates by the number of milliseconds in one day.

Define two dates using new Date().
Calculate the time difference of two dates using date2.getTime() – date1.getTime();
Calculate the no. of days between two dates, divide the time difference of both the dates by no. of milliseconds in a day (1000*60*60*24)
Print the final result using document.write().

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Reading line by line using readlines().
readlines() is used to read all the lines at a single go and then return them as each line a string element in a list. This function can be used for small files, as it reads the whole file content to the memory, then split it into separate lines. We can iterate over the list and strip the newline ‘\n’ character using strip() function.

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When the file is opened in append mode, the handle is positioned at the end of the file. The data being written will be inserted at the end, after the existing data. Let’s see the below example to clarify the difference between write mode and append mode.

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There are two ways to write in a file:

1. write() : Inserts the string str1 in a single line in the text file.File_object.write(str1)
2. writelines() : For a list of string elements, each string is inserted in the text file. Used to insert multiple strings at a single time.File_object.writelines(L) for L = [str1, str2, str3]

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Dacă căutați cheia de produs Windows 10, o puteți găsi introducând o comandă rapidă în linia de comandă. Iată cum:

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