我正在尝试使用python和良好的编码环境。作为一种解释型语言,我想逐行执行代码并理解在制作脚本之前会发生什么。我尝试在python解释器中运行这个简单的代码。 (我在使用python 2.7的ubuntu上)
public class DeleteConfirmation extends DialogFragment {
private MainActivity.ContactsAdapter mContactsAdapter;
public Dialog onCreateDialog (Bundle savedInstanceState){
//Use Builder class because this dialog has a simple Ui
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
//Dialog will have Make a selection as the title
builder.setMessage("Delete Contact?")
//An ok button that does nothing
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
//(HOW TO CALL THE DELETE OR DO DELETING AFTER CLICKING OK???
}
})
// A "Cancel" button that does nothing
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
}
});
//Create the object and return it
return builder.create();
}//End onCreateDialog
}
这作为脚本执行得非常好。但是当我在翻译上尝试时:
from time import localtime
print ('time is', localtime())
我收到以下错误:
>>> from time import localtime\
... print ('time is', localtime())
当我从终端运行时:
File "<stdin>", line 2
print(localtime())
^
SyntaxError: invalid syntax
我明白了:
$ python test.py
编辑: 第二个代码:
('time is', time.struct_time(tm_year=2017, tm_mon=3, tm_mday=19, tm_hour=20, tm_min=53, tm_sec=11, tm_wday=6, tm_yday=78, tm_isdst=1))
返回:
>>>import os
>>>print os.path.dirname(__file__)
答案 0 :(得分:0)
当您追加此行时会出现此错误 python交互式shell中的os.path.join(os.path.dirname( file ))。
Python Shell不会检测文件中的当前文件路径 与您添加此行的文件路径相关
所以你应该写这行os.path.join(os.path.dirname( file )) 在file.py.然后运行python file.py,它工作,因为它需要 你的文件路径。 这就是第二个问题的答案。
第一个问题很简单,你忘了括号print(localtime())
>>> from time import localtime
>>> print ('time is ',localtime())
time is time.struct_time(tm_year=2017, tm_mon=3, tm_mday=20, tm_hour=4, tm_min=32, tm_sec=55, tm_wday=0, tm_yday=79, tm_isdst=0)
>>>