大约有 1,400 项符合查询结果（耗时：0.0204秒） [XML]
Import and Export Excel - What is the best library? [closed]
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I'm going to throw my hand in for flat csv files, if only because you've got the greatest control over the code. Just make sure that you read in the rows and process them one at a time (reading the document to the end and splitting will eat up all of your memory -...
How to use the CSV MIME-type?
In a web application I am working on, the user can click on a link to a CSV file. There is no header set for the mime-type, so the browser just renders it as text. I would like for this file to be sent as a .csv file, so the user can directly open it with calc, excel, gnumeric, etc.
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Read a zipped file as a pandas DataFrame
I'm trying to unzip a csv file and pass it into pandas so I can work on the file.
The code I have tried so far is:
5 Ans...
【精心整理】【实用】visual C++中最常用的类与API函数 - C/C++ - 清泛网 -...
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CString类：处理字符串
CStringList类：支持CString对象的列表
CWinApp类：派生的程序对象的基类
CWnd类：提供所有窗口类的基本函数
API函数
CArchive类：用于二进制保存档案
CArchive::CArchive 建立一个CArchive对象
CArchi...
How to estimate how much memory a Pandas' DataFrame will need?
I have been wondering... If I am reading, say, a 400MB csv file into a pandas dataframe (using read_csv or read_table), is there any way to guesstimate how much memory this will need? Just trying to get a better feel of data frames and memory...
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Eclipse RCP开发桌面程序 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...JFace查看器主要分为以下几类：
1. ListViewer： 对应于SWT的列表控件，目的是将列表中的元素映射至SWT列表控件
2. TreeViewer： 对应于SWT的树控件，提供树的展开和折叠等基本操作
3. TableViewer： 对应于SWT的表控件，映射表中的元素...
Can iterators be reset in Python?
...y available.
As several answers rightly remarked, in the specific case of csv you can also .seek(0) the underlying file object (a rather special case). I'm not sure that's documented and guaranteed, though it does currently work; it would probably be worth considering only for truly huge csv file...
csv文件用excel打开修改保存后,日期少了秒 - 更多技术 - 清泛网 - 专注C/C++及内核技术
csv文件用excel打开修改保存后,日期少了秒csv格式的日期打开默认是没有秒的，而且再次保存后秒回丢失，通过设置单元格自定义类型可以解决。选中单元格（或选中列）右键，设置单元格...csv格式的日期打开默认是没有秒的，而...
Create Pandas DataFrame from a string
...ringIO (python2) or io.StringIO (python3) and pass that to the pandas.read_csv function. E.g:
import sys
if sys.version_info[0] < 3:
from StringIO import StringIO
else:
from io import StringIO
import pandas as pd
TESTDATA = StringIO("""col1;col2;col3
1;4.4;99
2;4.5;200
3;4...
Load data from txt with pandas
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You can use:
data = pd.read_csv('output_list.txt', sep=" ", header=None)
data.columns = ["a", "b", "c", "etc."]
Add sep=" " in your code, leaving a blank space between the quotes. So pandas can detect spaces between values and sort in columns. Data co...