我试图简单地将文本文件的内容读取并存储到数组中,但是:
ins = open( "file.txt", "r" )
array = []
for line in ins:
array.append( line )
ins.close()
它给了我一个"开放"的错误:
Unresolved reference 'open' less... (Ctrl+F1)
此检查检测应解决但不能解析的名称.由于动态调度和鸭子打字,这在有限但有用的情况下是可能的.顶级和类级别项比实例项更受支持.
谁能解释我做错了什么？谢谢
我正在尝试执行以下脚本:
import Foundation
class TestURLSession{
var session: NSURLSession!
func run(){
session = NSURLSession.sharedSession()
let url = NSURL(string: "http://www.veenex.de/tmp/json")
let request = NSMutableURLRequest(URL: url!)
request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
request.HTTPMethod = "GET"
let getDataTask = session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
// HTTP Response contains an error
if let httpResponse = response as? NSHTTPURLResponse {
if httpResponse.statusCode != 200 {
print("response was not 200: \(response)")
return
}
}
// Error submitting Request
if error != nil {
print("error submitting request: \(error)")
return …我有一个程序,我需要做很多计算,但输入可能不完整(所以我们不能总是计算所有结果),这本身就很好,但是会给代码的可读性带来问题:
def try_calc():
a = {'1': 100, '2': 200, '3': 0, '4': -1, '5': None, '6': 'a'}
try:
a['10'] = float(a['1'] * a['2'])
except (ZeroDivisionError, KeyError, TypeError, ValueError) as e:
a['10'] = None
try:
a['11'] = float(a['1'] * a['5'])
except (ZeroDivisionError, KeyError, TypeError, ValueError) as e:
a['11'] = None
try:
a['12'] = float(a['1'] * a['6'])
except (ZeroDivisionError, KeyError, TypeError, ValueError) as e:
a['12'] = None
try:
a['13'] = float(a['1'] / a['2'])
except (ZeroDivisionError, KeyError, TypeError, ValueError) as e:
a['13'] = …我有一个很容易以丑陋的方式做的问题,但我想知道是否有更多的Pythonic方式.
说我有三个列表A,B和C.
A = [1, 1, 2, 3, 4, 4, 5, 5, 3]
B = [1, 2, 3, 4, 5, 6, 7, 8, 9]
C = [1, 2, 3, 4, 5, 6, 7, 8, 9]
# The actual data isn't important.
我需要删除列表中的所有副本A,但是当重复的条目被删除时,我想对应的索引从删除B和C:
A = [1, 2, 3, 4, 5]
B = [1, 3, 4, 5, 7]
C = [1, 3, 4, 5, 7]
通过将所有内容移动到新列表,这很容易做到更长的代码:
new_A = []
new_B …我想减去两个日期
即我已经在文本框中输入日期,类型String
如下所示
type(waitForObject(":VWAP Calculator_LCDateTextField"), "07/24/14")
我正在捕捉那个日期,如下所示
Current = (waitForObject(":VWAP Calculator_LCDateTextField").text)
所以,现在我想用我当前的系统日期减去捕获的日期,并获得天数的差异.我尝试了很多方法但没有成功.有人请尽快帮助解决这个问题.
PS:我有python 2.4和2.7