concatenation

问题 Say I have a folder which have multiple excel files with extension xlsx or xls , they share same header column a, b, c, d, e except some empty sheet in several files. I want to iterate all the files and sheets (except for empty sheets) and concatenate them into one sheet of one file output.xlsx . I have iterated through all excel files and append them to one file, but how could I iterate through all the sheets of each files if they have more than one sheets? I need to integrate two block of

问题 Say I have a folder which have multiple excel files with extension xlsx or xls , they share same header column a, b, c, d, e except some empty sheet in several files. I want to iterate all the files and sheets (except for empty sheets) and concatenate them into one sheet of one file output.xlsx . I have iterated through all excel files and append them to one file, but how could I iterate through all the sheets of each files if they have more than one sheets? I need to integrate two block of

问题 I have four images and I want to concatenate them into 1 image.I tried using concatenate function but there are multiple images and from them i need only in a batch of 4 images. Actually the images are named as 0.jpg, 1.jpg,2.jpg and 3.jpg Below is the code which contains four images and concatenates them to be one image. But i am having around 500 images in a folder and I want to group them in a pair of four based on the range like first4 then second 4 and so on. import numpy as np import

问题 I have two DataFrames of arbitrary shape of the type: A B C 0 A0 B0 C0 1 A1 B1 C1 2 A2 B2 NaN 3 A3 NaN NaN 4 A4 NaN NaN and A B C 2 NaN NaN C2 3 NaN B3 C3 4 NaN B4 C4 5 A5 B5 C5 6 A6 B6 C6 The two DataFrames have overlapping indexes. Where there is an overlap, for a given column, there is a non- NaN in one DataFrame, and a NaN in the other. How can I concatenate these such that I can achieve a DataFrame with all values and no NaN s: A B C 0 A0 B0 C0 1 A1 B1 C1 2 A2 B2 C2 3 A3 B3 C3 4 A4 B4 C4

问题 I have two DataFrames of arbitrary shape of the type: A B C 0 A0 B0 C0 1 A1 B1 C1 2 A2 B2 NaN 3 A3 NaN NaN 4 A4 NaN NaN and A B C 2 NaN NaN C2 3 NaN B3 C3 4 NaN B4 C4 5 A5 B5 C5 6 A6 B6 C6 The two DataFrames have overlapping indexes. Where there is an overlap, for a given column, there is a non- NaN in one DataFrame, and a NaN in the other. How can I concatenate these such that I can achieve a DataFrame with all values and no NaN s: A B C 0 A0 B0 C0 1 A1 B1 C1 2 A2 B2 C2 3 A3 B3 C3 4 A4 B4 C4

问题 I am trying to combine multiple csv files into one, and have tried a number of methods but I am struggling. I import the data from multiple csv files, and when I compile them together into one csv file, it seems that the first few rows get filled out nicely, but then it starts randomly inputting spaces of variable number in between the rows, and it never finishes filling out the combined csv file, it just seems to continuously get information added to it, which does not make sense to me

问题 clips = [] def clipFinder(CurrentDir, fileType): clips.clear() for r,d,f in os.walk(CurrentDir): for file in f: if fileType in file: clips.append(r+file) random.shuffle(clips) def removeVods(r): for f in clips: if 'vod' in clips: os.remove(r+f) def clipString(): string = 'intermediate' clipList = [] clipNum = 1 for f in clips: clipList.append(string+str(clipNum)+'.ts'+'|') clipNum+=1 string1 = ''.join(clipList) string2 = string1[0:len(string1)-1] return string2 def concatFiles(): clipFinder('

问题 How to concat variable and string in bash script ? val1 = Variable1 + "any string " eg : val1 = $i + "-i-*" where i = 24thMarch I want echo val1 : 24thMarch-i-* What is proper proper to get the solution ? 回答1: Strings are concatenated by default in the shell. value="$variable"text"$other_variable" It's generally considered good practice to wrap variable expansions in double quotes. You can also do this: value="${variable}text${other_variable}" The curly braces are useful when dealing with a

问题 How to concat variable and string in bash script ? val1 = Variable1 + "any string " eg : val1 = $i + "-i-*" where i = 24thMarch I want echo val1 : 24thMarch-i-* What is proper proper to get the solution ? 回答1: Strings are concatenated by default in the shell. value="$variable"text"$other_variable" It's generally considered good practice to wrap variable expansions in double quotes. You can also do this: value="${variable}text${other_variable}" The curly braces are useful when dealing with a

问题 I am new to openpyxl and cannot figure out what the reason for my error is. I hope you can see the problem and show me what to change! What I want to do: I want to concatenate the cells from columns F to M per row and put the concatenated value into column E like below. (The rows do not always fill up from column F to column M, since per row are different kind of signals. But I have not put an if clause for this yet. This is just an information about the structure.) Input: A B C D E F G H ..