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Error in range function syntax enter image description here
for x in range(20),
if x % 2 == 0
print x
else
print 'odd',
output:
File "<ipython-input-106-a3bbe30e4016>", line 1
for x in range(20),
^
SyntaxError: invalid syntax
just replace the comma in the first line by :
Then, in Python 3.x, write print("toto") instead of print "toto".
Finally, the end of an if condition needs a : (like in a foor or a while loop)
for x in range(20):
if x % 2 == 0:
print(x)
else:
print('odd')
Related
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Let's say i have the following file:
balloons:
- 2
- 3
Each number above should represents how many times i want to print the string. So for example I would like to process this to output as following:
balloons:
- red
- red
- blue
- blue
- blue
I only have red and blue balloons. The digits will vary from one file to another, so my search string would be a simple regex search sed -e "/[[:digit:]]\+/ perform_my_action"
Try:
awk 'BEGIN{idx[2]="red"; idx[3]="blue"}
/^-[ \t]+[0-9]+/{for(i=1;i<=$2;i++) print idx[$2]; next}
1
' file
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I have written an awk statement, and the "a" dictionary is not storing values properly for an unknown reason.
I have the following file:
cat lookup.txt
1 a
2 b
3 c
However when I write the following awk statement the "a" dictionary seems not to be storing values properly:
awk 'NR==FNR{a[$1]=$2;print a[$2];print $2}' lookup.txt
a
b
c
I would expect that statement to print as follows:
a
a
b
b
c
c
Any help would be greatly appreciated.
You store a[$1] but fetch a[$2]. When the program ends, the a array contains three records: a["1"] = "a", a["2"] = "b", and a["3"] = "c". When you fetch from the array, there are no elements a["a"], a["b"] and a["c"], so those values are printed as nulls. I think you probably want to print a[$1].
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Suppose I have a file similar to the following:
hello
hello
hi
hi
hello
hey
I would like to find the indices of every unique line and using a comma as the indices separator. So ideally, the output would be like:
hello 1,2,5
hi 3,4
hey 6
What has been done in getting the value of lines by using the following codes,
{ arr[$0]++ }
END { for (i in arr) {
print i
}
}
the result is,
hey
hi
hello
Try using this script
{
words[$0] = words[$0] == "" ? FNR : words[$0] "," FNR # appends the line, sorting for the word
}
END { # once we are done reading the file
for (w in words) # for each word, the sorting order depends on awk internal variables.
{
print w, words[w] # prints the desired output
}
}
Please see Controlling Array Traversal for more details on how the words are going to be printed out and how to control it. For more details on FNR see What are NR and FNR.
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i have a csv file as below only one column(cust_code) with quotation marks and each row also has quotations
“CUST_CODE”
“CST001001”
“CST000235”
“CST010231”
“CST010235”
“CST010231”
“CST010235”
“CST010231”
“CST040015”
i am tried to read this file in pandas and i'm getting error as
'utf-8' codec can't decode byte 0x93 in position 0: invalid start byte
also, i tried by passing encoding type as ascii and utf-8
but nothing worked
Try passing encoding='cp1252' instead. Make sure to swap out 'Documents\Book1.csv' with whatever your filepath to the file is below:
df = pd.read_csv('Documents\Book1.csv', encoding='cp1252')
df
“CUST_CODE”
0 “CST001001”
1 “CST000235”
2 “CST010231”
3 “CST010235”
4 “CST010231”
5 “CST010235”
6 “CST010231”
7 “CST040015”
Here is a wikipedia with more info about that encoding type: https://en.wikipedia.org/wiki/Windows-1252 . A quote from the Wikipedia article:
"...common result was that all the quotes and apostrophes (produced by "smart quotes" in word-processing software) were replaced with question marks or boxes on non-Windows operating systems, making text difficult to read."
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I would like to create an input mask which looks like this C-HG__.
But because C represent option character or space in masking (VB.net). It wouldn't let me.
Please assist.
Try using the escape element: \
MSDN has a fairly nice write-up. Here's an excerpt:
\
Escape. Escapes a mask character, turning it into a literal. "\\" is the escape sequence for a backslash.
Possible duplicate with this question and/or this question.