摘要： ProblemI got a "Latex error" when try to use view comamnd in Sage 5.2.I've already installed (a lot of, I'm not familar with TeX) texlive, and I can compile tex code manually.Reason:dvipng missing.Sage use dvipng to ensure(maybe other purpose) the generated dvi file -- output of la 阅读全文

摘要： 1. about SageSage is a free open-source mathematics software system licensed under the GPL. It combines the power of many existing open-source packages into a common Python-based interface.2.install(linux) Download tar from sage website, extract to destination folder, then run ./sage.3. 3.color on t 阅读全文

摘要： RangeRange property and shortcut referencesApplication.Range("B2")Range("B2")Range("A1:D10")Range("A1:A10, C1:C10, E1:E10")Range("A1", "D10")Range("Name")Range("A1", Range("Name"))'Shortcut:[B2][A1:D10][A1: 阅读全文

摘要： The Workbooks CollectionSub ActivateWorkbook1() Dim sFullName As String Dim sFileName As String Dim wkb As Workbook sFullName = “C:\Data\SalesData1.xlsx” sFileName = sGetFileName(sFullName) If bIsWorkbookOpen(sFileName) Then Set wkb = Workbooks(sFileName) wkb.Activate Else Set wkb = Workbooks.Ope... 阅读全文

摘要： The Active Properties ActiveCell ActiveChart ActivePrinter ActiveSheet ActiveWindow ActiveWorkbook Selection Display Alerts Application.DisplayAlerts = False’operations... 阅读全文

摘要： os.madedirs:os.makedirs(path, mode=0o777, exist_ok=False)Recursive directory creation function. Like mkdir(), but makes all intermediate-level directories needed to contain the leaf directory. If the target directory with the same mode as specified already exists, raises an OSError exception if exis 阅读全文

摘要： Notes on argparse 阅读全文

摘要： Install kernel-headers and kernel-devel in Fedora:Suggestion: first update your system. In case that you installed the latest kernel but a older one is in use.yum updateyum install kernel-headers kernel-develOr, tell which kernel you want to install by:yum install kernel-devel-`uname -r` kernel-head 阅读全文

摘要： When installing some supported packages in python3.2.2, usually got a error: (cannot remember clearly but like array object or so)Try to change the following file:%python%/Lib/distutils/command/build_scripts.py line 15:first_line_re = re.compile(b'^#!.*python[0-9.]*([ \t].*)?$')to:first_line 阅读全文

摘要： Tuples:T = (1, 2, 3, 4)len(T)T + (5, 6)T.index(4)T.count(4)#Tuples are immutableSets:T = (1, 2, 3, 4)len(T)T + (5, 6)T.index(4)T.count(4)#Tuples are immutableFractions:from fractions import Fractionf = Fraction(2, 3)f+1f + Fraction(1, 2)Types:L = [2, 3, 4]type(L) #<class 'list'> for 3. 阅读全文