python - Find an element in a list of tuples -


मेरे पास एक सूची है 'a' 

  a = [(1,2) (1,4), (3,5), (5,7)]

मुझे एक विशेष नंबर के लिए सभी ट्यूप्ले ढूंढने की आवश्यकता है। 1 के लिए कहना होगा 

  परिणाम = [(1,2), (1,4)]

मैं ऐसा कैसे करूँ?

यदि आप मैच की पहली संख्या चाहते हैं तो आप ऐसा कर सकते हैं: 

  आइटम में आइटम के लिए आइटम [0] == 1]

यदि आप बस उन में 1 के साथ ट्यूपल्स की खोज कर रहे हैं: 

  [वस्तु में आइटम के लिए 1 आइटम में]

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