Enum string comparison To compare a string with an enum, extend from thestrclass when declaring your enumeration class, e.g.class Color(str, Enum):. You will then be able to compare a string to an enum member u
AI代码解释 varb=document.body;varc=document.getElementsByTagName('canvas')[0];vara=c.getContext('2d');document.body.clientWidth;with(m=Math)C=cos,S=sin,P=pow,R=random;c.width=c.height=f=500;h=-250;functionp(a,b,c){if(c>60)return[S(a*7)*(13+5/(.2+P(b*4,4)))-S(b...
result=re.sub('abc','',input)# Delete pattern abcresult=re.sub('abc','def',input)# Replace pattern abc -> defresult=re.sub(r'\s+',' ',input)# Eliminate duplicate whitespacesresult=re.sub('abc(def)ghi',r'\1',input)# Replace a string with a part of itselfresult=re.sub("(\...
match Match a regular expression pattern to the beginning of a string. fullmatch Match a regular expression pattern to all of a string. search Search a string for the presence of a pattern. sub Substitute occurrences of a pattern found in a string. subn Same as sub, but also return the ...
(caption='root') db_constraint=True # 是否在数据库中创建外键约束 parent_link=False # 在Admin中是否显示关联数据 OneToOneField(ForeignKey) to, # 要进行关联的表名 to_field=None # 要关联的表中的字段名称 on_delete=None, # 当删除关联表中的数据时,当前表与其关联的行的行为 ### 对于一对一 ##...
delete from tb1 where id>10 update tb1 set name='root' where id>10 select * from tb1; select id,name from tb1; 对于自增: desc 表:查看表的规则 show create table 表 \G:查看怎么创建表的 alter table t1 auto_increment=20;修改自增 ...
In a template string, the values between the curly braces, e.g. {created.year} are replaced with metadata from the photo being exported. In this case, {created.year} is the 4-digit year of the photo's creation date and {created.month} is the full month name in the user's locale ...
'w' deletes everything in the file (or creates it if it doesn't exist) and opens it for writing. You can also use the mode 'a'. This goes to the end of a file and adds text there. In shell terms, 'r' is a bit like <, 'w' is a bit like >, and 'a' is a bit ...
Unpack memoryview into tuple of: type, version, width, and height. Delete references to release the memory associated with the memoryview instances. Note that slicing a memoryview returns a new memoryview, without copying bytes (Leonardo Rochael—one of the technical reviewers—pointed out that even...
Because the power of the glob module comes from pointing to a folder (i.e., a directory rather than a file), let’s delete or comment out the previous file-reading code so that we can use argv[1] to point to a folder instead of to a file. Commenting out simply means putting hash...