Extract the first two characters of names in a list and concatenating into a string?

python concatenate string and variable
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return the concatenation of two strings
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concatenate two values in python
create a string 's1' by concatenating two strings with values "py" and 'thon'. print 's1'.

I have a list

names = ['John', 'Ralph', 'Frank', 'Luke', 'David', 'Helen', 'Chloe', 'Sophia']

I want to take the first two letters and combine them together such as:

JoRaFrLuDaHeChSo

I found the code below that does a similar job and I added [:2] to get the first two letters however it doesn't work.

print("".join([str(x) for x in names[:2]))

You put the slice in the wrong place. Also, the names are already strings, you don't need str().

print("".join([x[:2] for x in names]))

Python: How to get first N characters in a string? – thispointer.com, How do you get the first few characters of a string in Python? I need to extract the 1st 2 characters in a string to later create bin plot distribution. vector: x <- c("75 to 79", "80 to 84", "85 to 89") I have gotten this far:

You were almost there, the list slicing needs to be done on the string, not the original list.

my_string = "".join([x[:2] for x in names])

Strings and Character Data in Python – Real Python, How do you access all the characters in a string in python? In Excel, there are some formulas can help you to quickly extract part of text. Extract first n characters. Supposing you want to extract first 3 characters from a given list data, please select a blank cell that you want to place the extracted result, then use this formula

You can also qvoid syntax if you like:

names = ['John', 'Ralph', 'Frank', 'Luke', 'David', 'Helen', 'Chloe', 'Sophia']

# import the needed standard functions
from itertools import islice, repeat, chain

# take 2 initial characters of each string
prefixes = map(islice, names, repeat(2))

# chain prefixes
concatenated = chain.from_iterable(prefixes)

# join to one string
result = ''.join(concatenated)

What are the two internal subtypes of string data type in python , has index 0 , the next has index 1 , and so on. Extract first n characters from string. Select a blank cell, here I select the Cell G1, and type this formula =LEFT (E1,3) (E1 is the cell you want to extract the first 3 characters from), press Enter button, and drag fill handle to the range you want. Then you see the first 3 characters are extracted.

Splitting, Concatenating, and Joining Strings in Python – Real Python, What are two internal subtypes of string data in Python? Extract the First Name (Access Query Tip) In your query, create a field and use a combination of the Left and InStr functions to extract the First name. Left([strName],InStr([strName],” “)-1) Here’s a screen shot of the function in the Query Design Grid. Here’s a screen shot of the result. Extract the Last Name (Access Query Tip)

[SQL Basic] How to work with String Functions in SQL —My SQL , Concatenating With the + Operator; Going From a List to a String in Python With .​join() usernames, product descriptions, database column names, or really anything These two facts can help you learn (and then remember) how to use .​split() . you'll get an empty string, which you can see in the first and last elements of  I want to extract the 6th and 7th characters as 'state code' from my string variable of total 8 characters (e.g. 0029334F). I am using the code: gen Scode = substr( FACTORY_Id,6,7)

Assign a Name to a String, Combine customer first and last name columns to make a new full name column And to combine the two in MySQL, you can use CONCAT . Q2. Let's count the length of the customer's full name (characters in the first and last name). The SUBSTR function is used to extract only a part of the full string. It is a very common situation in Excel that your worksheet contains a column of full names, and you want to split first and last name into separate columns. The task can be accomplished in a few different ways - by using the Text to Columns feature, formulas, and Split Names tool.

Comments
  • you are slicing the list rather than strings