Question

我有一个像这样的字符串元组列表

['(-315.0, 106.0)\n', '(-179.0, -163.0)\n', '(90.0, 76.0)']

我将如何将其转换为此

[(-315.0, 106.0), (-179.0, -163.0), (90.0, 76.0)]

我在代码中尝试了eval()，但根本没有改变列表。该代码是

        with open("{}.ctd".format(load), "r") as f:
            data = f.readlines()
            positions = []
            for i in range(len(data)):
                data[i].rstrip()
                print(eval(data[i]))
                positions.append(data[i])
            print(positions)
            draw()

Answer 1

您可以使用extension UIView { enum GlowEffect: Float { case small = 0.4, normal = 2, big = 30 } func doGlowAnimation(withColor color: UIColor, withEffect effect: GlowEffect = .normal) { layer.masksToBounds = false layer.shadowColor = color.cgColor layer.shadowRadius = 0 layer.shadowOpacity = 0.8 layer.shadowOffset = .zero let glowAnimation = CABasicAnimation(keyPath: "shadowRadius") glowAnimation.fromValue = 0 glowAnimation.toValue = effect.rawValue glowAnimation.fillMode = .removed glowAnimation.repeatCount = .infinity glowAnimation.duration = 2 glowAnimation.autoreverses = true layer.add(glowAnimation, forKey: "shadowGlowingAnimation") } }：

ast.literal_eval

Answer 2

data = ['(-315.0, 106.0)\n', '(-179.0, -163.0)\n', '(90.0, 76.0)\n']
result = []


for item in data:
    exec('result.append({})'.format(item), {'result':result})
print(result)

或

for item in data:
    result.append(eval(item))
print(result)

输出

[（-315.0，106.0），（-179.0，-163.0），（90.0，76.0）]

Answer 3

将元组列表转换为列表的Python代码


# List of tuple initialization 
lt = [(-315.0, 106.0), (-179.0, -163.0), (90.0, 76.0)] 

# using list comprehension 
out = [item for t in lt for item in t] 

# printing output 
print(out)

如何将包含元组字符串的列表转换为元组列表？

3 个答案: